Bad rails conventions got me a weekend stay with the CEO of Airbnb

I'm mostly curious where they parked to hike Muir Woods on a Sunday.

This is a cool article and seems like the author had a great stay with the Host. Just leaves me feeling like it's a sponsored ad in a way, though.

I don't see the incrementing integer ID's as a "bad convention". It's a simple and intuitive solution that works for most apps. Its ok to be "guessable". You should set permissions properly regardless of how random your ID's are.