Google closed his Google Account including Gmail, Google Drive, Google Calender etc. without notice and without explanation. After 6 days he got it back after a google employee he knows personally escalated the case internally.
I could finally access it. Well, ideally all the services should be decentralized (each person/company hosting their own email, social network, cloud storage etc). But if that is not feasible, you can at least try and use a different company for each service. In that case violating the terms of one service would not shut you out of others.