Well the problem is this. At a certain unnamed website, I've had to create three different accounts in the last 60 days because a troll keeps hijacking my username and has logged into an account using my name. Complaints to the administrators about it have been ignored so I suspect he's either cracked my password (which was somewhat unique) or is using my username but adding hidden characters to it to fool the website into thinking it's a different username. Changing my password doesn't seem to have helped.
I need to come up with some kind of plausible proof of what's going on here since my requests have either been ignored or they're saying nothing's wrong.
It's ridiculous. Has anybody encountered this kind of situation before?