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

To find the longest fizzbuzz string on the post number after the 362 >>8 "die" posts https://dis.tinychan.net/read/prog/1582047203 are decorated:
>> Array.from (document.querySelectorAll ("button.num")).map (e => e.innerText.match (/(\d+) buzz=(\S+)/)).filter (m => m != null).map (m => [m [1], m [2]]).sort ((a, b) => a [1].length - b [1].length).slice (-5)
0: Array [ "770", "FiveSevenEleven" ]
​1: Array [ "825", "ThreeFiveEleven" ]
​2: Array [ "990", "ThreeFiveEleven" ]
​3: Array [ "693", "ThreeSevenEleven" ]
​4: Array [ "924", "ThreeSevenEleven" ]
And on the "die" post counter:
>> Array.from (document.querySelectorAll ("div.post > div.body")).map (e => e.innerText.match (/#(\d+).* fizz=(\S+)/)).filter (m => m != null).map (m => [m [1], m [2]]).sort ((a, b) => a [1].length - b [1].length).slice (-5)
0: Array [ "210", "ThreeFiveSeven" ]
​1: Array [ "315", "ThreeFiveSeven" ]
​2: Array [ "165", "ThreeFiveEleven" ]
​3: Array [ "330", "ThreeFiveEleven" ]
​4: Array [ "231", "ThreeSevenEleven" ]