bitch shields are lots of times girls just shutting down and are not giving any AI or are actually giving anti AI's. this will help to weed out AFC's becuase they will think she is unapproachable. lots of times a girl BS can come in during conversation with a guy or a PUA. lots of times you might hit a topic or a spot where the girls BS goes up and she starts acting rude or asking the guy to leave.

most women arent usually bitchy or mean but when put in the right circumstances this is used to get rid of AFC's and make sure that only guys she will be attracted to stay around. a girls Bitch Shield usually when come up in extreme circumstances such as a high traffic night club where she gets hit on many times a night.