Do any men actually fall for these international date scams?

I speaking in particular of those from Nigeria and Russia. I've been on Y Personals and it seems that is all I receive. I've played along with a few of them. The Nigerian scammers are really bad. They will want to marry you on the second letter. The Russians play the game a little longer. Both however ask for one thing in the end "Wire me $XXXX.00 so I can come to see you." It so bleepin' obvious that I can't believe men fall for these but apparently it works.