A recent survey (German) by the well-known German Forsa institute now showed the social effects of this data retention law: Communication habits are indeed changing.
1.002 individuals have been questioned on May 27th and 28th. These are the results:
* 73% know about the data retention
* 11% said that they had already abstained from using phone, cell phone or e-mail in certain occasions
* 6% believe to receive less communication since the beginning of the data retention
* 52% said they probably would not use telecommunication for contacts like drug counselors, psychotherapists or marriage counselors because of data retention
And the sad fact: 48% still think that data retention is a necessary step for crime prevention.