Just a minor example. Last night I got invited into a pt on my blu. I was in jeuno and he asked me to come to yhoator jungle so I did. Took about 10 mins to get there (swapped to WHM->tele'd->walked to kazham->swapped to blu->chocoboed to yhoator). I got there to a half complete pt and wasn't overly thrilled about that. After about 5 minutes, the blm warps and the pt leader (a nin named Arathorn) disbands the pt and mijin's to HP.
After this, I tell everyone in my ls what happened and then edit my seacom to call out Arathorn for being a douche by name. Before the night is over I get 4 tells asking about my seacom. Before the night was over, at least 30 people knew that Arathorn invites are a waste of time. And that was just from me spreading the word in the span of about an hour.
Zomg you like totally destroyed his life. How do you feel knowing he is probably commiting suicide at the very moment because of you?
Don't mess with rappa he'll mess you up >.>