Not sure how valid this is, just quoting:

<<A California court has issued a subpoena demanding Google reveal the IP addresses of journalists writing for a corruption busting journal from the Caribbean.

The August 28 subpoena, issued by the Superior Court, County of Santa Clara, as part of a "libel tourism" action taken by non-US property developers, demands detailed information about the operators of "tcijournalgmail.com". The account is the main email address of the TCI Journal, the most influential journal covering the Turks & Caicos Islands. ...

According to the notifying letter from Google to the journal, Google intends to hand over the requested records without defense and suggests that the Journal file a counter-motion with the Santa-Clara court itself.>>

>> http://wikileaks.org/wiki/Gmail_may_hand_over_IP_addresses_of_journalists

[Via http://www.reddit.com/r/technology/comments/9fosa/gmail_may_hand_over_ip_addresses_of_journalists/]

Can Google be sentenced for deleting definitely those data from their database in order to not reveal it to Court?