Besides being on or near the forefront of the Riot Grrl movement, L7's lead singer, Suzi Gardner gained them quite a bit of notoriety at the Reading Festival in 1990. Upon receiving a bit of heckling, she reached into her pants, pulled out her tampon, and threw it into the crowd. The most disturbing part was that some fan had the balls to throw it back on stage.

Music aside, I think that properly sums up the attitude of these four punk-rock ladies.