Wikipedia has to pass a fine line of trying not to involve itself in politics, unless it's a clear threat to it's ability to it's job, and it's not clear that surveillance (even on such a broad scale) prevents it building an encyclopaedia.
Wikipedia could argue that people will self-censor themselves and thus avoid looking up information on Wikipedia related to illnesses, sexual topics and so on. Its the same argument libraries has when claiming peoples library card history is protected.
