I got a few things I set aside for extreme moral violations, such as S.Assault, child murder, mixture of both.

Heart attacks and strokes are random in real life. If one of my players fucked around like that, they’d find out pretty quick. Either the character dies or becomes permanently altered.

It’s a hard rule I set out in session zero that I won’t entertain. Implied torture is one thing but I won’t go into detail. Ultimately, I’ll smite a character if they want to tread into unwanted waters.

If not allowing those players to play into those things because it’s “what their character would do” and I’m taking away their player agency, my table ain’t for them.

So go ahead and roll a Con save with a DC30 and see if you come out the other side.