It may be impossible to verify but how prevalent is it for someone to say they are single when they are not? Has anyone had first hand experience with that?
I actually went out a few times with least two men whom I found out later were married. When I couldn't get direct answers to questions, such as where they live or where they work, I began to realize they must have something to hide, so I moved on. Also, if a man is single, he can't wait to show you his place.
I found my ex-wife was on POF listing herself as divorced, in and she was seeing guys. I filed for divorce.
I've dated here and there and have run into all kinds. I try to be trusting, but when people hide things that's normally the first clue. Like not sharing Facebook or photos. Or Instagram. Or they have a weirdly restricted schedule.
Eventually I learn what they are about and decide is the situation worth keeping