Thought Crimes
I'm pretty sure here in the US it's even illegal to have depictions or simulations of underage sex. So google or microsoft might just automatically ruin your life for some questionable manga or an 18 year old in pigtails that you might have unknowingly downloaded 3 years ago.
The kind of people that choke to death a guy selling loosie cigarettes, or lock a kid in guantanamo for 12 years on a rumor, are not the kind of people I want getting automatic tip-offs as to what's in my cloud storage. Yet another reason to bail from the cloud!