Unfortunately, it is, it was and it will always be necessary to spy on people who are suspicious of committing a crime. Proper surveillance has saved uncountable lives.<p>Years ago, police was using cameras and directional microphones. But as technology evolves, the methods to prevent crime have to envolve as well. To not allow the police to use the same technology as the criminals would actually endanger stability of the society. If you don't agree, have a look at what happened and happens in Africa all the time as an extreme example to what happens it mankind lives without proper regulations.<p>The key point that needs to be discussed is not whether this kind of technology should be used, it's how and who is allowed to use it. Countries need a proper separation of powers. And the use of surveillance should only under any circumstances be approved by the independed jurisdiction.<p>Personally, if you can get one pedophile or terrorist I wouldn't care if the whole police of Germany would share my Jena Jameson collection.