Anonymization is a lie
Anonymization doesn't work in the face of Big Data, so any time someone claims it's all good because they anonymize user data, they're either intentionally lying or they have so little understanding of the issue that they can't be trusted with handling any data whatsoever.
Checking terms and conditions of a service is all well and good, but 99% of them will tell you the same thing: "we'll use your data as we see fit". Also, let's not forget that a large number of these statements specifically include language that allows them to unilaterally change them, without notice, at any time. Which means that you can't trust them no matter what else they say.
Cloudy services are like War Games: the only winning move is not to play.
Biting the hand that feeds IT
