Be careful. But is it that much more dangerous than picking up someone in a bar?
You don't know who anybody is. Online dating isn't anymore dangerous than meeting someone another way. You always need to careful. A pretty face and a good reputation can hide a great deal of evil.
To each their own. Everyone can't marry their high-school sweet heart.
I've had great experiences with online dating, met more than several people from it. These individuals were normal people, good people, and authentic people. One just needs to know how to chat safely (without revealing certain info) as well as meet in person safely (public place). There probably are more bad people hiding behind profiles online, but you can also meet some crazy people on a blind date, at a bar, referred to from a friend or relative so think they are all online. I'm on Match.com, it represents as a legit source. E-harmony is another major online source to date. You just need to go about the experience mindful, attentive and prepared to handle yourself in any situation; such as any encounter with complete strangers in general.
You have to be very carfull. I went onto Eharmony and nobody even talked to me. I think even if they would have I wouldnt have talked to them let alone meet them.