His killers allegedly met him through the social networking site Orkut.
So?
Are you going to blame the medium for this, or realize that people meet up all the time, in a thousand different ways, and a few wind up killing and being killed, unfortunately.
For anyone to place any blame on a social networking site for either issue (unfortunate victim or psychotic murderer) would be incredibly ignorant, IMHO.
I agree, Excalpius BUT: As you increase exposure, you increase the chance of something bad happening. Whether the good outweighs the bad ... matter of opinion/fear. I like fear. Kept humanity on the planet this long.
I visit WC... which clearly has a much better class of lunatic/weirdo.
Hey! Watch it! I resemble that remark! 
*doc thinks, "starkers, that funny bastage, nailed it!"
I am starting an Anti-Social Network. Please don't sign up,log-on,visit or become a member. Just stay away.
In fact,I don't even want to be a member,so I quit!
Reminds me of what I posted on the prior Twitter thread.
And I wouldn't be part of a club that would have me as a member, anyway,
.
Isn't it time that people start interacting as much as they can with their families instead of getting incessant tweets from twits that you have to dispose of and pay for only to throw away? How about those "Non-disposables? Spouses, children and friends/loved ones!