This is another solid example (relevant to the discussion with @popobawa4u) of advocacy challenges presented when groups coerce other groups.
. . . the metal doors that security officers controlled to regulate the traffic flow between prison units started opening more slowly for Krzykowski. Not infrequently, several minutes passed before a security officer buzzed her through, even when she was the only staff member in a hallway full of prisoners. Krzykowski tried not to appear flustered when this happened, but, she recalls, “it scared the hell out of me.”
My grandmother handled public defender matters in the 60s. The guards in the detention facility where she met clients did this to her too.
Thank you, @jerwin. This article will be added to materials for two active violence prevention community campaigns.