Liars/Cheaters on Internet Dating Sites

Hey guys...I really need your help. I'm writing something about the prevalence of liars and cheaters on internet dating sites (ie match.com, lavalife, etc.). Apparently, a lot of people have experienced finding out someone wasn't as advertised (looks, background, even gender), or finding out that the person they meet actually has a significant other but is using the site to find people on the side. So if you have any of these experiences, are someone who has done these things, or know of friends who have had these experiences, email me! Everything will be confidential and nothing will be judged. Thanks so much!!