Yes! I have had some long-term relationships with women I've met online. (7 years) in one instance. When you get right down to it, "It's not about (where) you meet but (who) you meet!" It's kind of arrogant for some people to believe they are the only "worthwhile people" online.
The people that are online are the same ones in the nightclubs. attending sporting events, shopping at the mall, working and paying bills..etc Just as there are bad apples in all those locations you'll find the same kind online as well. There were liars and cheaters long before the internet was invented. No matter how you meet ultimately you want to take your time to get to know a person before becoming emotionally invested.