If you get close enough to grab Vader’s mask, I highly doubt you’ll live long enough to start pulling it off of him.
Danger Assessment: Tug on Superman's Cape, Spit into the Wind, Pull the Mask Off The Old Lone Ranger
I recall an Astro City story where some small-time mook stumbled upon Jack-in-the-Box’s secret identiy. He considered selling it to one of his enemies for big money – until it occurred to him that once said enemies knew he had that information, they had cheaper methods of convincing him to give it up. At the end of the story, he left town, clearly intending to forget the whole thing.
Only one of those three is dangerous in a wide variety of realities. Spitting into the wind is ALWAYS a bad idea.
That’s why messing with Superman or the Lone Ranger is so dangerous. The only way to interact with them is to break the natural order of reality.
The Lone Ranger will turn around, punch you out, rub his fist thoughtfully and say “That should keep him out for a good 10 minutes, and he won’t remember a thing.”
Then he’ll leave before you wake up with Post Concussion Syndrome, and spend months dealing with double vision and vertigo. Thanks, Lone Ranger!