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

- "you’d never have a Republican elected in this country again" moved to /anarchy/ between https://dis.tinychan.net/read/anarchy/1587122567#reply_202 2020-08-22 and https://dis.tinychan.net/read/anarchy/1587122567#reply_203 2020-08-24, after four months on /prog/.
- First rms: https://dis.tinychan.net/read/prog/1582047203#reply_221 2020-08-24, last rms: https://dis.tinychan.net/read/prog/1582047203#reply_855 2021-01-21.
- First suppression: https://dis.tinychan.net/read/prog/1582047203#reply_581 2021-01-19, last suppression: https://dis.tinychan.net/read/prog/1582047203#reply_999 2021-01-22.
- counts including header-only reminders: 193 | 413 (362 "die") >>28
- rates including header-only reminders, posts per day: 1.287 | 137.667 (120.667 "die")
$ python3
>>> import datetime
>>> datetime.date(2021, 1, 21) - datetime.date(2020, 8, 24)
datetime.timedelta(150)
>>> datetime.date(2021, 1, 22) - datetime.date(2021, 1, 19)
datetime.timedelta(3)
>>> 193 / 150
1.2866666666666666
>>> 413 / 3
137.66666666666666
>>> 362 / 3
120.66666666666667