I've only just recently gotten my diagnosis... but I can say for sure that if anyone I know tells anyone ELSE my diagnosis? I would definitely be angry, definitely would stop trusting them, and might very well cut them out of my life (it depends on who they are, who they've told, etc.). I've got a lot of trust issues... but it's no one's business to EVER tell anyone else about my personal life and health.

People tend to open up about stuff with me though, and I tend to reciprocate to various extents; I don't mind talking about some of my past experiences.

When people say things in any conversation (whether or not they know anything about me) that pertains to mental health I will in fact correct them. If they start to argue with me, it is one of the subjects that I will end up arguing back on. If they are totally ignorant I will certainly not share my own experiences with them at all.