That's the problem with all uses of banning, sadly. Creating new accounts for ban-evasions is still a Terms of Use violation, though, afaik, so if you could prove they'd done it, you could get them banned from the whole site. Which is why you'd need to see who was tracking you in conjuction with that, so you could keep an eye on people tracking you and notice if it looked like there was somebody evading a ban.

...it would probably be easier to just turn off tracking though, yes.