a long time ago when i first joined a forum, i did not perceive the posters as real people, and i was younger and my oppositional defiant disorder was out of control.
i used the forum to entertain myself, and that particular forum had no code to prevent misunderstandings. if i did not like a person, i would post things that they would reply to, and then i would go back and edit my post that they replied to to make them look stupid.
there was no "edited by:" footnote that indicated i had changed my post. you could even delete entirely your posts to make it look like the person was having a psychotic argument with themselves.
an example was when someone posted their reply to the question "what would you do with a million dollars", and i responded to his post by saying that i did not believe he had the mental capacity to conceive of the size of a million, and i added that even if he bought everything his mind could imagine, then he would probably still have $999,000 change.
obviously he jumped down my throat, and he posted something like "f*ck you dickwad! if ever i find out who you are , you're dead!"
then i went back and edited my post that he aggressively replied to, and changed it to something like "if i had a million dollars i would donate most of it to help to the poor".
anyway i did not last long there.
on another forum i joined, people did not like me and thought i was stupid, so i topped all the oldest threads i could find, and i tried to look as stupid as possible.
it was in 2006, and i replied to about 50 posts from 2002 in one sitting.
for example, there was a thread from 2002 titled "i am terrified about my job interview tomorrow", and i replied with "good luck for tomorrow".
on another thread, someone was talking about a prime minister, and i posted with "you should keep up with the news. he has been out of power for ages now"
etc etc
i had fun that night and went to bed and when i woke in the morning i was banned.