if two people meet online AND are single (or in a relationship that they are not happy in and are looking to get out of), and they are serious about meeting in person, then it has a chance. but, they have to be prepared to actually move in together, or at least closer, like the same town.
if one of the two parties is not really serious about the relationship, if all they want is an internet fling, one of the two parties will get hurt, either emotionally or physically.
now, lets say jim and stacy get meet in hong kong. she lives in baltimore, he in australia. unless one of them is willing to make the move towards the other, it most likely will not work. you have to be willing to make that leap, take that chance, to be with the one you love. i did, as did she, and we are so in love it is coming out of our ears. we have never been happier.
unfortunately, not everyone is as lucky as us. there were a few tense moments initially, but we just took each others hands, gritted our teeth, and faced those times together, as a team.