because people don't bother looking things up and end up posting shit that's below 18.Yet somehow those lines a blurred & end up shutting a good thread down.
most youtubers have their age stated somewhere. on some type of fan wiki, or maybe an ig post for their bday. it's not that difficult unless the youtuber is purposefully hiding their age. and when age is established, if it's just turned 18, then you make sure you only post stuff that they posted themselves after that.
threads getting shut down because people post someone underage happen because those posters didn't bother doing research or didn't bother reading the rules