But you have to physically go to the place to do it >_> So much easier if you could press a button at home which sends the signal.
Signals can be resolved depending on the expertise of the person resolving them. Yes, if you launch a massively massive coordinated attack, resulting in a spoon load of data, then maybe... but considering the time and effort to set this up, its just easier to sneak out at night with an axe or something and cut the cable!
Still, I think Die Hard 4.0 scenario would be epic..