Or if you found out you had your own KF thread?
Obviously the best strategy is to do an information overload and just dump my browser history. saves everyone the time of digging it up themselves and runs the thread out of new material so it just dies
Edit: Serious answer though would be make a post explaining whatever they'd have thought would be worth a thread, answer any reasonable questions that come up, then leave and ignore the thread until it dies off.
I've seen one thread on here where it was some guy who had his f-list and some pretty fucked up roleplay logs doxed come into the thread making a post basicly explaining that he knows its some fucked up shit and was seriously ashamed of it and people were roasting him pretty hard at first but he was really level headed about it and took the criticism well, pretty sure he got off on having a thread because of the humiliation fetish but the guy wasnt larping that in the thread or anything and was behaving fairly reasonably. I think his dox got removed anyways and the thread died pretty quick after he stopped posting so win/win i guess