I hate to tell you but you should probably prepare yourself for worse, eventually!
I remember receiving a series of "comments" through a web page (male talking) from a gay man swearing his undying love for me!! On several occasions, he even included a number of somewhat "compromising" pictures!
I did not fall in to the trap of replying directly (as that would have given him access to my e-mail address) but kept simply deleting the comments. Fortunately, he finally seemed to get the message that I was not interested!
I have also received countless marriage proposals from women in the former Soviet Bloc and Africa. So far, I haven't taken any of them up on their kind offers...
Same one was going to make me a millionaire, and then he saw my art, and wrote telling me I was going in an Argentian Contemporary Book... Obvious B.S. So I sent the jerk an Invoice just in case he did publish as he was displaying one of my paintings. Haven't heard friom him again.
Nothing special has happened in this case for me. I get very general fan mail. In fact not all take the pain to write one. I do in most of the cases but even I write very simple mail; "Glad to be your fan. Will be following your Hubs" or "Thanks for joining my fan club" etc etc