Imo it might not be worth the risk, especially if you've been buying NP, pets etc. or done anything illegit like SSing loads of avvies. Last thing you want is TNT poking around and finding anything suspicious. They might think something like "why was their man last active a long, long time ago back in Sept. but they were logging in on a side...that doesn't add up".
Giving TNT too much credit perhaps, but I'd leave it unless you realllyyyyyy wanted to try and get the theme..