LOL -- if they get good traffic, there is no need to be scared of TMs. I am working on some Mothers Day TM names which got us $700-800 in PPC just in a few days last mothers day -- going to do cpa this year on them.
Just setup a different account for each TM name and you are done. Just for the record, create different gmail accounts for each account and in the whois of the name and forward them to keep track of the mail coming your way.
That should solve the problem for you.