Brian, please, several members of the editorial team have repeatedly asked you to be more brief in your edit summaries. I'm not reading what you wrote this time but rejecting it based only on the quality of the edit itself. We don't include long notes like the one you've suggested on individual English glosses, and while it's true we have several entries mentioning 2ch that should probably be updated, but 2ch as a site doesn't exist under that name any longer, and has splintered as well into more than 1 site IIRC.

The Decline Effect
The Hidden Probability Law Controlling Markets, Politics, Culture, Religion, Epidemics and War By Dean Brooks · 2023
Appendix:
summerfag (4chan slang) 

Marcus's original ref("esp. 4chan"):
https://en.wiktionary.org/wiki/summerfag
(Internet slang, derogatory) A new, inexperienced, and presumably teenage user who joins an online community (especially 4chan) during the American school holidays at summer 

https://knowyourmeme.com/memes/summerfag
Summerfag is a term used by users on the site 4chan as underage users who post on 4chan instead of going to school. The term is often used as a scapegoat for bad posts, especially in highly populated boards such as /b/.

Does ‘summer Reddit’ really exist?
https://www.reddit.com/r/TheoryOfReddit/comments/8q9jvg/does_summer_reddit_really_exist/
Came from 4chan. Another way for users to show superiority & differentiate themselves from one another; “ I’m an oldfag, you’re just some summerfag “ another one I’ve heard a lot is “sure is summer in here. I’m sure there’s some truth to it, but is probably blown out of proportion. I don’t think the number of users grows THAT much

This post is 6 years old now
https://www.quora.com/How-is-2chan-and-4chan-different
4chan is English and 2chan is Japanese. Moot founded 4chan 14 years ago, he also owned it for a long period of time until he resigned from his position and later on 4chan was bought by Hiroyuki Nishimura, the founder of 2chan(Futaba Channel) in which 4chan was based on.

https://en.wikipedia.org/wiki/2channel
2channel and its successors are more controversial than other social media in Japan;[5] they are extremely popular among Japan's extreme right-wing, known as the netto-uyoku, who post xenophobic comments, often targeting Koreans.[9][6] Defamation is of particular concern; by August 2008, Nishimura had received more than one hundred lawsuits for defamatory comments left on the website.[11] Announcements of crimes also have drawn scrutiny towards 2channel and its successors.[13][17][18][19] In 2012, 2channel was accused by the Tokyo Metropolitan Police of allowing its platform to be used by amphetamine dealers,[20] although no charges were filed.[13]

In September 2007, 2channel averaged over 2.4 million posts per day.[21][c] As of July 2020, 5channel had 1,031 boards receiving around 2.7 million posts per day on weekends,[22] with no growth since March 2016.[23][c] Meanwhile, 2ch.sc then had 826 boards receiving around 5,700 posts daily.[24][c]

Opening note: 夏厨, while seeming to have originated in the Japanese 2channel/2chan/2ch community,  appears to be in more broad use then "summerfag" is in English, probably because it is inherently less offensive.  "summerfag" is largely restricted to  a single website/community(4chan.org).  Outside of participation in, or discussion of, the website 4chan.org(and some derivatives, I guess), "summerfag" is not an appropriate gloss, and risks being inadvertently both hyper-offensive and not-understood. Unfortunately, I know of no other good English glosses, besides an [expl].

My first ref is an academic text that indexes it as "summerfag (4chan slang)". 

See also, for example:
site:twitter.com "summerfag" 
vs. 
site:reddit.com "summerfag" 

Twitter returns almost nothing.  Reddit returns lots of results, almost entirely 4chan-related groups.  I have included the first non-4chan reddit response, and it was a commenter referencing 4chan.

Then compare with the Japanese term below, which has thousands of hits on twitter (I've removed the username 夏厨系 from searches...):
site:twitter.com  夏厨 -夏厨系 

Clearly not the same in tenor.  It seems it could even be used light-heartedly in Japanese, and may even be used in the cooking/kitchen sense of 厨. "a cook for the summer". (maybe a sense[2], not sure)

The respective communities (2chan and 4chan) are large enough that I think keeping this entry has merit, but at the same time this use of "fag" without very-relevant provisos is a problem.  (this single entry was used to justify the addition of "fag" to the entry 厨, and I'm not so sure that's consistent with the general strength of 厨 in Japanese)

One of the ~6 twitter results, for example, is Japanese and shares an exciting English discovery about "fag". We don't seem to be their source, but this is the kind of thing I thing I would like to see us take more consideration of.

https://twitter.com/BlackHandMaiden/status/813193129973006339
fagは○○厨という意味でも使うらしいね summerfagとかで夏厨 fagはfaggotの略で政治的に正しくない表現のアレです アレ
among the replies, it's a 2chan term: まあ2ch用語みたいなもんですからのう

@@ -14,2 +14,2 @@
-<gloss>summerfag</gloss>
-<gloss g_type="expl">young and inexperienced user who joins an online community during the summer</gloss>
+<gloss>summerfag (note: the term "summerfag" is limited mostly to the online community 4chan)</gloss>
+<gloss g_type="expl">young and inexperienced user who joins an online community (esp. 2ch) during the summer</gloss>

@@ -12 +12,2 @@
-<misc>&sl;</misc>
+<misc>&net-sl;</misc>
+<misc>&derog;</misc>

nicopedia  hatena
http://shii.bibanon.org/shii.org/knows/2ch_slang.html
https://en.wiktionary.org/wiki/summerfag
g ng 
夏厨	43010