If someone has matching hashed IP to a banned acct are they vading?

And should I report that if I find it?

 

It might not be enough to have the person banned. The issue being the I.P could be from a public location, a proxy, or from a mobile network, etc.

Look between the two accounts and see if you can find any similarities, such as Skypes, MSN's, accounts for sale, the way they type, the graphics they use in their market threads, etc.