This has been going on for months now - loads of users who never bother to change their initial username that you give them.
It's really hard to tell them apart and, frankly, it's a gift to goady fuckers/trolls and the like.
We never used to have this system, so why do we have to have it now?
And, more to the point, why do we still have it when lots of us have been complaining about it as well?!