The dangers of Lawful Access

A superb illustration of the risks of mandating that a system be easily wiretapped by law enforcement has just been published.
(There's still a very strong push for lawful access legislation in Canada).

The lawful access infrastructure in the Greek phone system was used by persons unknown to tap the phones of over 100 people, including the Prime Minister, the Mayor of Athens, and an employee of the US embassy.

All the gory details are in the article in IEEE Spectrum
There are good blog posts by Matt Blaze and Steve Bellovin.