It's not too different to Internet dating sites. I don't really see anything wrong with it - I know of one guy who ended up marrying the girl he met over World of Warcraft, and a couple years later they are still very happy together. I also have a personal friend who met his girlfriend over an MMO and they have been going out for around 3-4 years now.

So really, to me it's just like meeting anyone else over the Internet, which works for some and might not work for others. However, I personally believe there are better ways of meeting people than through an MMO.