Greenguy's Board - Multi-submitters who lie

My link list is young, so I don't mind people submitting more than one site to it per day. What I do mind is assholes submitting multiple sites to me under different names. And its too bad because some of them make nice freesites. I dont have a ban list implemented, I will be re-writing a new link list system in the near future so I'll keep that in mind. Using multi-names is dishonest and I feel like they are trying to pull a fast one on me (When you use the same template, or don't bother capitalizing titles, use similar [bad] grammer among your sites, etc. it becomes painfully obvious). It's quite possible we have cases where people are maybe sharing templates but I tend to err on the side of dishonesty.

What do you guys recommend I do about autosubmitters who use multiple names?