You know...now that I think about it, I DID wear a Trek costume once: grade school, Halloween. (And I said "Trek or Treat"...cue groan here. But at my age...
I dressed as a Bajoran captain--even bought some "fake skin" and made myself one good looking nose. My mom told me it was too nerdy to wear to school for our Halloween parade.
Then a kid I did NOT like showed up.
In a captain's uniform (hand tailored, kinda sloppy).
With a Bajoran nose (clearly made of something like Play-Doh--whereas mine looked darned near real).
I was ten years old and I was PISSED.
My costume was light-years better and I knew it. I could've showed up that kid SO bad...