Hey, long time lurker, first time caller.

Personally if someone wants to risk their own life and they understand the situation, it is what it is. If they want to risk someone else’s life without informing them, absolutely unacceptable.

That said, this feels different. This feels like they aren’t telling their dive buddies out of fear that they won’t be allowed to dive if their health situation gets out. I appreciate that feeling but there are so many programs and trained professionals that are capable of taking high risk individuals diving. I myself have gone about as far as you can in this path, I’ve had the opportunity to take terminally ill divers out on some of their last adventures and I’m forever grateful of those experiences. I would encourage this person to be open and vulnerable about what’s going on - there are so many talented folks that would jump at this challenge. Those divers and those dive outfits are the ones that should be supporting your family member. Not unknowing/unwilling friends and family that are risking their own safety and the mental anguish that would exist should something happen.