It's not like Ebay where if you have a bad experience, your loss is stemmed to the material good you have given away
If you're going to play the rape-or-death card, then why not also say that an EBay package you receive could contain a bomb or anthrax spores?
Personally speaking, AirBnB always baffled me, even before this incident. I would never have given my home for others to use and would find it weird to use that of a strangers' when travelling, but that's just me.
Other people clearly find value in it.
I'm surprised that this incident would have left a bad taste in your mouth, in the same way that I'm surprised when people who store super-sensitive information in Dropbox find out that maybe its not a secure bank vault.