Yes you can make a new account.

Yes if I see it, I'll mark it with negative trust. I don't always out alts of people with negative trust, for instance if all someone did was ask for a loan w/o collateral, or bought/sold an account, or something else that didn't cause any actual demonstrable harm to someone (or a serious attempt to do so)  then I don't.

I can't just ignore it, it wouldn't be right to deprive people of that information without a good reason. Though I don't generally have time to actively search it out. You do what you got to do, I'll do what I got to do.