As we all know, there is more than one way to fall into sin.
Even for a particular sin.
You can actually COMMIT that sin yourself, or you can advise or encourage someone else to do so.
So let's take anger for an example.
Does everyone realize that inciting someone else to anger is a sin? Because you don't know what they'll do when they're angry -- they might sin. Stoking the passions of another person for no good reason is being the opposite of a "peacemaker", and is sinful.
Therefore, being a "button-pusher", a teaser, troll, etc. on a forum would also be sinful. You're inciting HUMAN BEINGS to anger. As a far-from-perfect men said in the past,
"There are actual human beings behind the screen names. The screen names on here aren't items of artificial intelligence. This isn't a video game."
I think we all need to keep this in mind. Each screen name you read on here represents a real, living, breathing person. Someone God created for the sole purpose of loving and glorifying Him forever in Heaven. An immortal soul for whom Christ shed His Blood and died on the cross.