Adolescents at a middle school tease a girl because she has yet to shave her legs. the teasing represents an example of a sanction.

This is an example of a negative informal sanctions. Sanction can be either be positive through rewards and negative through punishment. Sanctions can take place from either formal or informal power. Negative informal sanctions frequently are in the variety of rumor, public mockery, social isolation, insults, or even terrorization of physical harm by other members of the community. 

i feel as if they would both catch on before to long because they would see them to frequent