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"Did you fall off a space elevator or something?!"

Only because it might compel some contrarian to build a space elevator. And I really want a space elevator.

That expression already indicates an ad-hominem rebuttal, and ad-hominems can offend by definition ("against the person"). By using a higher DH-level (src: http://www.paulgraham.com/disagree.html ) in argumentation, you can avoid a lot of problems and have more meaningful discussions.

The goal wasn't argumentation, it was to be heard so that argumentation could begin.

I was young and brash. I remain ashamed I said it.

Obviously the more PC phrase would be, "Time to put down the 'peace pipe' kemosabe." </sarcasm>