That is not necessary.

The trust system is more of a liability or neutrality than an asset to me.
Liabilities:
Takes up too much of my time dealing with complaints about my level, contracts enforcement
Place for people to libel me in retaliation for citing their own words
People "buying ratings" and wanting me to give them a positive rather than a neutral, based on them having no others or what seem to be weighty negatives (and people wanting my positives to be removed based on subsequent allegations)
Neutrality:
Those who act like they want to trade significant amounts P2P/OTC ignore my ratings and/or won't cryptographically verify it's actually me who earned them
Asset:
?