No captcha?

Hello,
I am learning programming and just discovered this website. But I am curious, how does it protect its users from spammers (people who post illegal or annoying things) without a reCaptcha? I thought clicking this blue box is required to prove that you are not a robot, can you please share any javascript that you use for this purpose?
Thank you and have a nice day,
Brian

Since the site administration keeps allowing >>386:

commie

https://www.stallman.org/archives/2021-jan-apr.html#31_March_2021_(Pro-business_party) I do not advocate being "anti-business"; it would be very bad to abolish business. (We have seen how bad Communism is.) However, businesses have a tendency to mistreat human beings, so a large part of the job of the state is to make businesses stop doing that.
https://www.stallman.org/archives/2021-jan-apr.html#15_February_2021_(Fight_the_system) I agree with Ms Farmand's criticism of capitalism as it is practiced by powerful companies in the US today — plutocracy, extractivism and dooH niboR — but I don't believe in eliminating all capitalism (all private business). Rather, I advocate eliminating the political power of business, and restoring democracy.

[libel]

* The Republican party fighting against ending child marriage in the US: ✞🐘✞ https://dis.tinychan.net/read/anarchy/1582047203#reply_328 ✞🐘✞ https://www.nbcnews.com/politics/politics-news/end-child-marriage-u-s-you-might-be-surprised-who-n1050471 ✞🐘✞ 'Well, Joseph married Mary when she was 8. If it was good enough for God, why shouldn't it be good enough for us?' ✞🐘✞
* https://www.msn.com/en-us/news/crime/was-he-killed-trump-asks-about-epstein-s-death-in-rambling-interview-with-axios/ar-BB17y1Iq 🐘 Trump emphatically defended standing by Maxwell, a British-born socialite who is charged with trafficking girls for sex alongside Epstein for years. 🐘 Trump is a longtime friend of both Epstein and Maxwell from their days as south Florida celebrities. The future president infamously once said Epstein loved women and liked them “on the younger side.” 🐘
* https://www.stallman.org/archives/2021-jan-apr.html#8_April_2021_(Stallman_support) — Supporting Stallman against a campaign of hatred — https://stallmansupport.org/ — https://stallmansupport.org/comments-in-support-of-richard-stallman.html
* https://www.fsf.org/news/rms-addresses-the-free-software-community — RMS addresses the free software community — by Richard Stallman — Published on Apr 12, 2021 10:24 AM