So one time on MWS, I played pithing needle and named Relic of Progentitus which was in play, and I needed that not to happen to me. So the next turn the guy pays one and activates relic's "crypt all graveyards" ability and I indicated to pithing needle. And he argued with me that because he paid one to activate Relic, that it was a "mana activated ability" and Pithing Needle didn't stop it. And he wouldn't budge on it so I'm like "Ugh, learn the rules" and left. Because screw that noise.

Another guy tried to get a land with Mystical tutor because it says "mana source" on the card and he wouldn't budge on the issue either. But that was IRL. IRL also does not have an idiot filter. And the worst thing about it was that his mystical tutor was a proxy written in sharpie on the back of a flooded strand.... LoL.