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

how does it protect its users from spammers

https://dis.tinychan.net/read/prog/1582047203
>> Array.from (document.querySelectorAll ("div.post > div.body")).filter (e => "die" == e.innerText).length
362

First of the tightly grouped suppression posts: 581 https://dis.tinychan.net/read/prog/1582047203#reply_581 Last: 999 https://dis.tinychan.net/read/prog/1582047203#reply_999 Stallman posts in between: 6 {626, 627, 807, 808, 854, 855}. Total number of suppression posts: 999-581+1-6 = 413. Out of those: "die" posts = 362 >>8 Total rms posts including header-only reminders:
>> Array.from (document.querySelectorAll ("div.post > div.body")).filter (e => /https?:\/\/(www[.])?stallman[.]org\/archives\//.test (e.innerHTML)).length
193

193 stallman posts | 413 suppression posts of which 362 "die" posts