I love the idea of someone following me, looking at that, and if they are not immediately Trek savvy, wondering about it.
Then maybe the light bulb going on over their head..
And the guy following you thinks "NCC-1701? WTF? Oh yeah, Star Trek. Frickin' nerd."
Better than following a damn prius with an Obama2012 bumper sticker. Trekkies never took any money out of my pocket.