Some violation can be easily seemed and the cops or other institutions will take some measures to deal with the violation. Nevertheless, some violation is not easily to be detected and while it was to be found, it was too late because it has already caused lots of loss for you! Therefore, it is really very necessary for you to to something to control even prevent this loss. Do not take it for granted that it is the duty of government, because they not only work for you but the whole states therefore you should really be very very careful!
As a top secret institution, some seminars and discussions are very important and should keep in secret. But a conversation on your cell phone or mobile phone may be easily leaked out and you even do not get any idea how things would happen like this. For example the Watergate scandal, this astonishing event put the popular President Nixon in the teeth of the storm. And we could say except the President Nixon as well as the bug and Candid camera device were both the prime criminal! For this event, we could only say that they deserved pretty much what they've got!
If we do something right and important that should take one hundred percent of it but was overheard by our enemies or other nations who are cherish illegally, what should we do? So , a jammer is very necessary for you. It can effectively protect your privacy and top secret of the nation and intercept other signals, so it is really very useful and you deserve it !