@theshadowoftheliving - I slept on this before posting so I could really wrack my brain, but outside therapy, I've only ever told 1 person I have DID. And I told him partly because I switched in feont of him regularly and he was going out of his brain with confusion, but mostly because he was a good friend who confided in me regularly about his private struggles with schizophrenia and I reached the point where I wanted him to know. And it didn't backfire at all.
But apart from him? Literally no one outside therapy knows.
If I had an infected ulcer on my back under my clothes? Wouldn't tell people that either!
But seriously, there are people and situations that different alters routinely handle for me. But they do that consistently. That person only ever sees the one version of me, so it isn't confusing for them, and doesn't require any explanation from me. So it's none of their business.
But confronting that reality, that certain parts ALWAYS take over in certain situations and around certain people? Privately, that has been incredibly helpful for me. And in some situations, it's actually helped me realise that there are certain people that I actually don't want in my life anymore. Not so much because I hate switching (I do), but because I can now appreciate that they are people that I don't cope with emotionally. That helps me keep myself in situations that I'm happy and safe in.
That's sort of a way of turning the issue of "do I disclose?" on it's head, and making it something useful to you. If there's someone in your life that triggers switching? Maybe you're considering needing to disclose that you have DID. But instead of thinking about whether to disclose, maybe think about "why do they make me switch?" and whether they're causing an issue for you that makes you feel unsafe deep inside.
People that you don't ever switch in front of? Just like the infected ulcer, there's no reason you have to share. You work on getting the ulcer healed in your own time, and the rest of the world goes about not needing to know.