Edit: Look at the last one... "Bribes people for good trust ratings" from a 4 post newbie. Not only does it not make any sense and is highly contradictory, but someone with such low activity/a throw away account that's not posted in 6 weeks shouldn't be able to participate in the trust system.
Technically speaking his opinion (although I do agree it is highly contradictory) has as much weight as your opinion considering that to a general layperson who knows neither of you it is hard to choose which is deemed trustworthy. This is the reason that although they are allowed to create trust ratings they are not on the DefaultTrust list as they are not deemed to be trustworthy by the mods on this site. Sure it is open to revenge attacks - but a moderated trust system is completely worthless as it simply propagates the views of a few people. The way it is set up is that you can create your own trust list and hence only 'trust' people you actually feel you can 'trust'.