At this point I want them to provide me two things:

1. remove the mesh from their site
2. give me the contact information of the submitter so I can have an offline discussion with him.

They have promised to do both by Friday.... we'll see if it actually happens.

Cheers,

I agree that it could be bad manners to post their responses.    I'm not trying to be petty, but I do want them to take a more serious look at their business practices. I also want to warn people that this type of thing is occuring.  

Last year I had to do the same thing with a  completely different site.  They were very apologetic and took the mesh down immediately.  As it turns out the submitter was a 14-year old kid who didn't know any better.  After a discussion with him about copyrights and mesh distribution, he agreed not to do it again.  With adults it's a bit more difficult.  Adults don't like to admit they're in the wrong (myself included).   Most adults will admit their mistake and move on.  

Am I wrong to want things to change?  Am I going about it in the wrong way?  If so, please tell me and next time I'll handle it differently.