whats wrong with renting through Craigslist (except obvious problem of spam from companies like AirBnB) ? Both parties may request and provide any documents/ver

whats wrong with renting through Craigslist (except obvious problem of spam from companies like AirBnB) ? Both parties may request and provide any documents/verifications until their mutual full satisfaction. We had no problem renting space in Europe from US for example though some amount of communication and search was involved - we didn't like some people, some people didn't like us as we needed full paperwork from them for visas, etc... i wonder how such fine tuning of mutual requirements would be possible through "blind renting" service like AirBnB.