I noticed the negative feedback from 2 DT-accounts yesterday. I don't think I've seen something like this before, and I don't think this is how the Trust system is supposed to be used. One person should not give someone positive or negative feedback from more than one account, as it leads to 2 positive or -2 negative on the user's profile.
A simple solution would be if hilariousandco uses hilariousetc for all feedbacks on your account.