I'd like theymos' statement on this rather than speculations.
Judging by other threads here, and looking at the help section, it should be technically possible. Heck over at Litecointalk you can do it yourself, and it looks like the same forum software.
We don't delete accounts anymore, because it is quite a bit of work. Before an account is deleted, theymos has to do at least the following:
1) Make sure that the account wasn't hacked.
2) Check for any existing scam accusations against the person.
3) Check their outbound PMs for scammy behavior.
This is a long, painful process, so theymos just doesn't do it anymore.
I don't think checking an account with zero entries in the trust thing and no PMs would take too long.
But whatever...
Not replying is rude though.