Teen loitering is apparently a big problem for the Brits. A few years back, they tried the opposite of a dog whistle:  The Mosquito, a device that emitted a buzzing sound audible, much like The Saturdays, only by those under 30.  be heard by those under 30. In retaliation, kids adopted the “repellent” sound as a cell-phone ringtone inaudible to teachers during class. Ace!

Now I Heart Daily reports that the grups have upped the ante, installing special pink fluorescent lighting said to hinder hanging-out by making acne look especially pronounced and heinous. (They really don’t remember what it was like, do they? Or wait, maybe they do.) Let’s hope, at least, that the technology doens’t fall into even wronger hands.