And not just sexual predators. Financial predators, too. And all kinds of God know what other predators. That guy who says he's a 60 year old widower looking for companionship may be just that, or he could be a guy looking for someone gullible to fleece, or worse. And some of those guys are very slick and know just what to say to entice a potential victim.
I think the advice Jeni was talking about above is very sound.