I haven't used one and don't intend to either after what happened to my friend. She meet a guy on a dating site and they hit it off. He was a very good looking man and they decided to meet in person at a diner. My friend was scared to go alone so I followed her there in my vehicle. He said he would be driving a red truck and would be wearing a denim shirt and jeans. We waited in the parking lot and a few minutes later, the red truck pulled in. A very large, elderly and bald man emerged from the truck. To make a long story short: He had used a very young picture for his profile and needless to say, my girlfriend and I left.