Mad_Jack
Legend
I am the worst referee in history because I have caused my 5E players to rage quit my games by:
Your players are clearly snowflakes - are you sure they didn't just melt?

I once got grief from a group who begged me to run a game for them (after I got tired of them turning every adventure into Dumb & Dumber meets Monty Python & the Holy Grail) and promised to keep it serious this time...
And then got mad because I vetoed their idea of trying to blow open a castle gate with several hundred pounds of dragon poop.

(Their rationale for the plan was the binary-chemical explanation given for how dragons breathed fire in the film Reign of Fire, and the extrapolation that dragon poop was therefore explosive because they would naturally be swallowing some of it.)
On the other hand, once when I was a player, I had a DM who straight-out told us he considered the game a chess match between him and his players and would have probably had us roll to avoid getting killed by falling branches while walking through the forest if I hadn't preemptively mentioned that I walked through the entire forest with my shield held over my head to avoid being killed by falling branches because I knew he'd probably try it, lol.