I think there has to be a "comfort" level on each others part, I mean if ya spend hours upon hours typing back and forth, you kinda get to know someone a little. To me it's kinda like "the next level".
However, they can mess with ya on the phone just as easy, I met a gal from Canada, on Yahoo, and we chatted for months, then she called me one day. We talked on the 'puter and phone for about 2 yrs, then after some simple internet research (typed her screen name into Google) I find out I'm not as "special" to her as I thought, Ha Ha Ha.
I asked her about it on the phone, all she said was "I gotta go".
Aint heard from her since.