It's much more likely that you'll be murdered by someone you have a close realtion with.
(Apart from being a bit snarky, it's also true, and leads (back) to:)
> I think just talking to people you meet at random will probably be a better solution.
It is. (Speaking from experience)
That said, one also get to know people online - from irc to games. I don't see any reason why a new "meet strangers" social network couldn't work. But if a majority of its users can't motivate themselves to talk to random people they meet - chances are the network will be coopted for some other agenda than "making new friends". Like "have more one night stands". And while sex is a healthy human activity, meeting people with the aim to become friends need a form of level playing field, and mutual intention.
Fighting off one unwelcome sexual advance every now and then is part of the human condition - but having to do it every time you "meet" someone, it gets old really fast.
Which is probably one reason people can meet in games: while people game for many aspects of gaming - most do it to relax and have fun.
If there is some way for people to "opt in" for random encounters such as Tinder, couchsurfing Meetup.com, it makes things much smoother.
What other sites are there that facilitate things happening in the real world? The MP3 experiment is perhaps my favorite.
I think just talking to people you meet at random will probably be a better solution.
(until I get murdered by a stranger!)