<human>: Can you condense the text into three sentences or less?

My grandmother lives in a retirement community with a superbly foul woman in her late 60s who is totally ruining the environment. She excludes other residents from participation in community events, gets events organized by others cancelled by making ridiculous complaints to management, and patrols the buildings actively policing everything from the amount of people gathered in outdoor patio areas to elevator usage to what newspapers and coupons may be traded amongst people. She's dug into the place like a tick. She has no qualms about verbal confrontation and will gladly get in anyone's face at the drop of a hat and WON'T back down. Ever. Then she'll complain to management and get the other person in trouble.

The residents are severely beaten down. Even management won't stand up to her. Everyone just indulges her rather than put up with the bullshit. Because nobody has stood up to her for so long she's been able to engineer this "aura of power" that intimidates others into staying in her good graces. It's goddamn sickening - literally over 90% of the people living there detest this woman behind closed doors, but nobody is willing to cross her... she would most certainly see those bold enough to publicly dissent become ostracized from the community. Isolation is its own special kind of hell; many people there have no socialization outside of the other residents.

I want to do something but I don't know what. I'm frustrated by not being able to actively intervene, but the last time I exchanged words with this tyrant I got a talking to from the management about how the unofficial rule is that this bitch just gets her way because it's too much of a pain in the ass to put up with her.

Location is in Wisconsin, and the site receives federal funding as part of a low income housing project. Don't know if that's relevant to possible approaches to this matter, but just in case. I'm not looking for illegal solutions btw... as much as I'd like to see a bit of justice-sans-process doled out it really wouldn't be appropriate.
<bot>: Old woman Gestapo has been making other retirement community residents miserable for years by using intimidation, isolation and other bullying tactics. Looking for ideas on how to break down her "aire of power" without direct confrontation.