luring people to invite them as per clickbait methods, using obfusication so they are accidentally invited, straight up blackhat hacking to manipulate the system, early on the public meetings were getting bombed by flashers

these types are handled by identifying and outing them, or chasing them away, internet has to go beyond the "your ip number is" thing and demonstrate that there is a real knowledge of who they are, and that they are bothering people and it isnt going unnoticed.