Pro-Football players whoring themselves, is it right or wrong?

Yesterday, I took the tour of the new Cowboys Stadium. Before the tour begain, there were several x-cowboys in the pro-shop posing for photographs, and signing pictures. I spoke with Eugene Lockhart, and took his picture, then I went to Mel Renfro's table, I talked to him, he let me take a couple of pictures of his (2) Superbowl rings, he even let me hold them. I then walked up to Everson Walls table, and while he was signing a picture I snapped his picture...Well, things went bad quickly, he demanded that I owed him $20.00 for the picture, he proceeded to get very rude and kept demanding $$ for the pic. I told him, "you know what, I don't want it anylonger anyway" and deleted it from my camera. Do you think it is right for players demanding $$ for random pictures taken of them? Mel Renfro, and Eugene Lockhart didn't mind at all.