If you deny that they're you that seems like an excellent reason to ban them.

Edit: Regarding my belief that you're responsible for the accounts. I 1) Know you've used other account names and 2) didn't care that they could be linked to you. I assumed you were just using it to avoid the instant downvoting that your main account has dealt with in the past. I was not attributing their use to any kind of malice or conspiracy. My prior for someone else creating the account to follow you around with lame agreement and repost your old ideas in order to further sour opinion toward you (or do a really poor job of the opposite) is very low.