I signed one of my female friends on POF as a joke. She knew I did. So I had her password. I made the account, logged out, then about 7 hours later signed back in. In 7 hours, she had 60+ messages.

The problem is this: Most guys on dating sites just want to get laid, so they email just about every woman on there. The women, who would normally not have a chance with these men, all of a sudden think they are super models because they get a lot of messages. While these women may have went for a normal, average guy, now they are getting messages from all sorts of guy, and their self-esteem sky rockets. Now they have their pick of the litter, so they do not email back the average guys they would probably have gone for in real life.