If a really terrible person was walking right into some kind of danger, would you warn him or her?

I would like to think I'd do the same but have a deep down feeling that my EMS training would kick in and I would do something stupid like warn them. And hope they were so arrogant that they wouldn't listen.

I'm with you on this. The terrible people like Hitler or Stalin wouldn't listen to my advice anyway.

I won't lie, I'd be very tempted not to say or do anything...but I have a huge conscience and that would prevent me from doing that. I am just one who though I may have a strong feeling and or opinion against someone, it's not right for me to "play judge and jury", to play "executioner" would be just as bad as what I was against them for (especially if it involved their health or life)

I would get the popcorn.

I think you've hit the nail on the head. There are several members of Congress whom, if walking right into the path of an oncoming truck, I would not warn.

If it was Stalin or Hitler I might actively point them in the direction of trouble

Not if it was Donald Trump

Yes I would warn him/ her

Yes. I would warn them.