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

day 19 [90]
hour 0|
hour 1|
hour 2|
hour 3|
hour 4|
hour 5|
hour 6|
hour 7|+++++++++++++++++++[19]
hour 8|
hour 9|
hour 10|
hour 11|
hour 12|
hour 13|
hour 14|
hour 15|
hour 16|
hour 17|+++++++++++++++++++++++++++++[29]
hour 18|++++++++++++++++++++++++++++[28]
hour 19|+[1]
hour 20|+++++++++++++[13]
hour 21|
hour 22|
hour 23|
day 20 [129]
hour 0|
hour 1|
hour 2|+++++++++++++++++++++++++++++++++++++++++++++++++++++++++[57]
hour 3|++++++++++++++++++++++++++++++++++++[36]
hour 4|
hour 5|
hour 6|
hour 7|
hour 8|
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hour 10|
hour 11|
hour 12|
hour 13|
hour 14|
hour 15|
hour 16|
hour 17|
hour 18|
hour 19|++++++++++++++++++++++++++++++++++++[36]
hour 20|
hour 21|
hour 22|
hour 23|
day 21 [50]
hour 0|
hour 1|
hour 2|
hour 3|
hour 4|
hour 5|++++++[6]
hour 6|
hour 7|
hour 8|
hour 9|
hour 10|
hour 11|
hour 12|
hour 13|
hour 14|
hour 15|
hour 16|
hour 17|+++++++++++[11]
hour 18|+++++++++++++++++++++++++++++++++[33]
hour 19|
hour 20|
hour 21|
hour 22|
hour 23|
day 22 [93]
hour 0|
hour 1|
hour 2|+++++++++++++++++++[19]
hour 3|+++++++++++++++++++++++++++[27]
hour 4|+++++++++++++++++++++++++++++++++++++++++++++++[47]
hour 5|
hour 6|
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hour 23|

posts code in /prog/

console.log (Object.entries (Array.from (document.querySelectorAll ("div.post > div.body")).filter (e => "die" == e.innerText).map (e => e.parentNode.querySelector ('span.post_time').innerText).map (s => s.match (/^2021-01-(\d+) (\d+):(\d+)$/)).reduce ((acc, item) => {
day = item [1]
hour = item [2]
min = item [3]
if (day in acc) {
hours = acc [day]
if (hour in hours) {
hours [hour] += 1
} else {
hours [hour] = 1
}
} else {
acc [day] = {[hour]: 1}
}
return acc
}, {})).sort ((a, b) => a [0] < b [0] ? -1 : 1).map (([day, hours]) => "day " + day + " [" + Object.values (hours).reduce ((s, x) => s + x) + "]\n" + Array.from (Array (24).keys ()).map (h => "hour " + (h < 10 ? " " : "") + h + "|" + (h in hours ? "+".repeat (hours [h]) + "[" + hours [h] + "]" : "")).join ("\n")).join ("\n"))