Beanbag, welcome to our forum!
I'm sorry if you are being subjected to some kind of witch hunt. When a new member registers here, they are free to pick any username they wish.
Our ability to determine "who's who" is only as good as the tools we have available to us. We have been able to identify a couple of troublemakers from elsewhere on the internet. But we can neither confirm nor deny any of our members' identity without their input.
If you are having a hard time somewhere else, it is entirely outside of our ability to do anything about it. Your best course of action is to take it up with the people who are so concerned about "who's who" that it is causing problems for you. I know that might seem harsh and callous, but please remember who doesn't trust you, and who would welcome you.
We don't really care who our members are, so long as they enjoy participating here and don't cause any problems. What they do elsewhere is their business.