One of my BFFs married a dude she met off of Match. She had some hysterical moments b4 she met him though. Some of the best were the dudes who posted pics that were taken 10 years and 100 pounds ago.
Also, there was a guy I knew that had similar experiences. He once told me that a chick who said she looked like Jennifer Aniston lied, "unless of course, it was that she was a chick who ate Jennifer Aniston".
You take your chances, but really when don't you take a chance when dating, whether on-line or in a bar or some knucklehead from work. It's all a gamble.