It's a good way to disseminate information that can't be made official, though. Gossip will spread faster than memos. Sadly, it's prone to alterations depending on the tellers narrative. Plus, people make up stuff all the time. There's a general "group think" that's hard to manage, and secrets just get broken by some deductive reasoning PLUS the unreliable narrative. So you could be close lipped and just get shit found out because now you're a puzzle they want to solve and then spin for their own agendas.

One of my friends is a woman who is socially awkward. She is kind, and wants to do a good job. But frequently gets fucked over by catty office workers. Often by pretending to be her friend and then just using her (to get secrets, for example) until she's all spent up, and then she becomes the scapegoat until she quits. It's weird because I have worked with her and I know she's amazingly talented with a modicum of support, but women just fuck her over again and again, because being a mildly autistic woman just irritates the fuck out of neurotypical women.