"
School pupils helped police track their suspects through the use of distinctive tags.
The 17-year-olds were traced by police after officers visited schools in the Bonaly, Colinton and Oxgangs area where the graffiti appeared.
Pupils were able to point to the suspects from the distinctive tags - AERO, SB and DARE - which were sprayed on bus stops, road signs and telephone boxes.
"
http://edinburghnews.scotsman.com/topstories/Teens-charged-over-graffiti-spree.6812183.jp
Probably better than hanging around (the police) on Marchmont street corners with speed cameras - no really!