> If you're in that sort of org, don't stay there. It will be a magnet for such folks.

That's true. I've been at a job where people routinely talked badly about people in other teams but also a colleague I closely worked with was constantly accusing me of breaking agreements, going behind management's back. At first I didn't take all of this very seriously and thought trying to say as little as possible will be the best strategy. Eventually though my manager asked me directly and I mentioned these things. He said he'll take action and eventually also HR got in the loop. Some things happened but the general issues persisted. FWIW I heard colleagues even saying really insulting things about HR.