To add to what others have said, there is one (female) resident at my mother's CH who can be aggressive. I once arrived to find her smashing her rollator against the front door. The staff let me in through a side door, and the resident then started crashing against interior doors. The staff just observed and tried to calm things down as she wasn't hurting anyone. That was the worst I've seen her, she is usually just verbal, or passive aggressive, she likes to block doors or corridors. But as Joanne said - she isn't fast, so I keep an eye on her and can anticipate and avoid her.
There are others who shout, but not at anyone in particular. There are only five or six men in the CH but they all seem very peaceable. There was one who was a bit of a pest but I only saw him once, so either he was there on respite or they moved him on due to his unwelcome behaviours.