Title.
Literally don't.
I shouldn't have to block people in an otherwise enjoyable game for totally dumb reasons.
If someone says multiple times they lost a family member via suicide, and no, they don't want to discuss it, and no, they would like you to stop talking in a certain way and seek help, maybe, just maybe DON'T THREATEN THEM THAT YOU'LL GO DO IT EVERY DAY FOR A WEEK.
Don't tell them "I'm here for you!" Go. Get. Help.
Don't threaten them with inflicted harm, self or otherwise.
Stop trying to control and guilt trip