You don't see them much anymore,
You do over here, byb - they're known as "fly-posts" and those who put them up are "fly-posters." It is usually against the local bye-laws to do this, and the police will stop you and report your name to the local council, who will then prosecute you - but only if they catch you. Therefore, you have to be "fly" to get away with it.
It is a method of advertising much favoured by fringe political groups who are staging demos or public meetings, but is also used by lesser known pop-groups and folk bands as a cheaper way of advertising. (it's only cheap if you have volunteer labour, incidentally - it needs three to fly-post: one to ut the paste on, on to slap the poster on the wall and one to watch out for the police!) You have to be quick - a case of noun or never perhaps?
