The best was the gal who wanted all the wires removed from her house because the neighbours were using them to spy on her. Her, I referred to another contractor. I couldn't resist.
If you wanted to be outright cruel you could have told her about laser bugs where they bounce an IR laser off of a window and decode the the AF modulated on the laser by the vibrating glass from the sound within the room.
She would have had someone out to remove the windows along with the wires.
I've known people who swear "they" can watch you through your TV.
