The "solution" for this sort of problem is information. Unfortunately, the 3rd parties that can help correct the information asymmetry seem to turn into protection rackets.<p>[1] <a href="http://advanceindiana.blogspot.com/2015/03/class-action-lawsuit-exposes-angies.html" rel="nofollow">http://advanceindiana.blogspot.com/2015/03/class-action-laws...</a><p>[2] <a href="http://www.ibtimes.com/yelp-extortion-rampant-say-small-business-owners-class-action-lawsuit-against-review-bully-appealed" rel="nofollow">http://www.ibtimes.com/yelp-extortion-rampant-say-small-busi...</a><p>[3] Google "BBB protection racket"
While I agree that it can be frustrating trying to deal with contractors, I don't think that this kind of commodification of labor is healthy for society.