This idea came to me one day in an IRC mental vision. A march for breast cancer, not unlike most marches. It would have the regular setup for a march with one catch. All participants in the march would be topless. This would be perfect for an area where toplessness was legal in public.

This isn't so unusual you say, there are lots of marches with topless people. But you see at the head of the march would be a team of topless, yet highly skilled breast examiners who for no charge would give quick exams to any onlooker willing to remove their top and if something suspicous was found they would be given a ticket and directed to wait for a exam van which would follow at the end of the march. The van would be used to give more thorough exams to anyone who had been given a ticket during the march.