As we start to rely on cloud providers to look after our data, we need to either become more educated (and proficient) by creating regular backups ourselves (which kind of makes the idea of managed cloud services defunct imo), or be in a position where we can individually sue for damages incurred by negligence on the part of the service company in question.
So many of these companies have liability clauses which negate all responsibility in situations where negligence leads to loss.
I think the current situation is crazy, considering the amount of responsibility and trust that's involved in using web-services which store and manage irreplaceable data.