You can steal a credit card, but it'd be more difficult to steal an active Facebook profile and keep it for any period of time. Fake Facebook profiles aren't easy to build up, and you'd have to be really malicious to go through the trouble. It would eliminate the "just for fun" aspect that many of these perverted abusers would enjoy.
Fake facebook profiles are actually pretty trivial to build up and can be done in about a week (I wrote a paper where I did just that last year). The meth addicts that seem to be taking advantage of ab&b would probably make the effort.
It's also going to make it pretty hard to get started if you don't have a Facebook profile I would imagine. Thankfully I already have positive reviews through a dozen-ish stays on AirBnB or I would probably be screwed since I'm not on Facebook.
its really not, I don't know what that guy is talking about. Its actually quite easy to create fake profiles, and fake networks, and add friends that would match that information.
It would take you a really long time to fake a profile - and it would take an extended amount of effort. Unless you have a specific target in mind, how easy is it, really, to create a credible network of 300+ friends?
In any case, I will bet you $1.14 USD that I can find a credit card number faster than you can generate a facebook profile that's credible.