Jesse, no on in here is a copy right lawyer. If it is a big a deal as yo see to be suggesting, you need to seek professional help, not look from advice from people that don't anything more then you do.
If you don't want to pay for a lawyer, that would suggest to me that it is not all that big of a problem.
The bottom line is EVERYONE that is selling images on the net is experiencing the same thing. Everyone does a lot of bitching about it, but in reality there is not much you can do without seeking (very expensive) legal action.
