-snip-
If you're conducting business in a legitimate way, then no one's "voice", not even a DT member's, should have any effect on your business.
Realistically, it does though.
As long as the Trust Rating is not being abused,
What would be an abusive rating for you?
then no one has any say over having a rating removed other than the one who gave the rating (and Theymos, but that's not the point). As far as I can see, there is nothing unreasonable about negging someone for participating in account trading, as I am also of the opinion that there is no legitimate reason to buy accounts on a public discussion board. (And no, trying to earn BTC from posting is not a legitimate reason.)
You can have that opinion, but it does not change the fact that is valid reason for many others that engage in account deals.