If an AM visted your site, and their product compliments your sites then I do not see the problem with them contacting you. This medium is supposed to lend to communication between programs and affiliates right?
The problem i would have is the AM who sent a PM with content not related to my sites and a blatent lie. That’s pretty lame.
I would appreciate the AM who really checled out my site and offered me a supperior product or better commission.