I was walking near the local jail recently, listening to music, using bluetooth headphones, and experienced the strangest kinds of interference for about a block all the way around the jail. My phone froke the fuck out. It made me really wonder for the first time what kind of surveillance equipment they’ve got running in there.
Then again, this is the same jail that has amateur strip shows on the parking structure across the street for the prisoners to watch, so yeah, who knows what surveilling people across the street might yield?