While I kind of agree that it can be sad for two people to meet online because they cannot meet people irl (I can't believe I just typed that) it does seem like they're very happy and could have met people in real life.
I know a lot of couples who have met online and even ended up getting married. I don't see anything sad about it. Online dating is a brilliant idea - it allows you to quickly and easily narrow your choices to people who are much better matches than you'd get if you just went by "hey that girl is cute."
(full disclosure: I have a long term girlfriend and we did not meet online, but if I were looking, I'd try out online dating)
I think the premise of this thread is incredibly narrow minded.
First, you assume people here are trading in in-person interactions for online interactions. Maybe and maybe not. Maybe people are trading in TV or video games.
Second, why is online interaction so worthless? I originally joined this site in 2003 to talk about the Iraq war, a topic I'd consider worthy of thought and discussion.
Third, if people enjoy posting in online forums, why is that a "vice?" Is it a vice to watch TV? Is anything except in-person interaction with other people a vice?
I have friends, family, and a girlfriend. I work out every day and work far more hours than I'd like. And I like macrumors as a way to relax, read about new things, and just see what the tech news is (I like technology - so sue me). I don't at all understand the mindset that a harmless, relaxing, enjoyable activity is a "vice." Sure you can take it to an extreme where it starts to interfere with other things in your life, but that's true of anything.
And if the concern is how other people see you because of the number next to your name... wow.