It's a good idea if you ask me. Speak to someone online all the time before you ever meet em, and the only thing you have to go on is 'do I get along with this person?' which is the main reason people seem to break up. On the other hand picking someone up down the pub and chances are you'll only learn 'Do they look good, are they good in bed?'. 
Dylan Moran made a point in one of his sketches about this, how you wouldn't dare buy a toaster when your drunk, but you'll probably marry someone you met while drunk.
Dylan Moran made a point in one of his sketches about this, how you wouldn't dare buy a toaster when your drunk, but you'll probably marry someone you met while drunk.