Heard about this the other day from my daughter, apparently one of the cocky kids out of her year has been suspended pending a possible exclusion for doing this (not the first thing the person in concern has done, has a pattern of bad behaviour), luckily my daughter does not hang around with the cretin and has respect for her teachers.
Wasn't aware it was a widespread thing until I stumbled upon this thread.
Headteacher at my daughter's school is really fair and a thoroughly decent chap, but extremely intolerant of bad and disruptive behaviour, runs a very tight ship, so if it continues the offending kids are not gonna last long.