As a long time lurker, I find this general topic amusing and enjoy discussions of "What's the dumbest thing...". However, I think we should keep in mind that many people (and myself) do take offense when we divert from amusement to the more vicious nature of some responses.
I find it helpful to keep in mind some of my more embarrassing moments -- my wife constantly teases me about some of my own examples.
I would like to add, though, that confusing names (TTA/monorail, Fast Track/Test Track) can actually be a symptom of dyslexia -- no, you don't have to be unable to read to be dyslexic. It's a continuum from mildly impaired to full-blown scrambling of words and numbers. One symptom of mild dyslexia is confusion of proper names: the brain can't retrive the right name, and comes up with the closest match. My mother and I both do it, and I've since learned that we have the mild case (even though we both read voraciously). I'll always remember my mother calling some fish-and-chips restaurant "Ship Ahoy" and as a child I could never understand why some places were advertised "Bar and Girl."
So keep posting the funny ones, but the next time you hear someone refer to the "Big Ball", smile, politely say "Oh, you mean Spaceship Earth" and don't forget that you, too, may someday have Whatshisnames Disease
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(and since this is my first post -- signed rhampson aka Dr.Rob)