is only as good as the person who posts the ad and the person who answers it. It works both ways if the person is looking for something and sees your ad and wonders if you are a flake.
Agree, be careful on the liability part. I have no answers to that but "in my mind" i'd wonder if I were to randomly hire some guy and he moved my furniture, tripped and fell and hurt himself. What liability would I be accountable for? I mean, in a perfect world you'd put an ad in, some guy answers, moves some stuff for you, picks up some extra cash and everybody is happy. That may very well happen! But stil,,,