Agent X and Agent Full Stop are a pair of graffiti activists who call themselves Acción Ortográfica Quito: they sneak around the streets of Quito, Ecuador with cans of red spray-paint, correcting the punctuation, grammar and spelling of the city's prolific graffiti writers, bringing legibility to boasts, professions of love, and political messages.
The Spanish-speaking world has fallen in love with their mission, and there are new graffiti grammar squads in both Spain and latinamerican countries.
(via We Make Money Not Art)