First of, yes I drink PBR but I think that has more to do with being from Montana.....
I don't have a bike computer on any of my fixies, because I find it distracting. If the computer is there, I tend to pay more attention to my current MPH or Cadence, than the road and cars around me. Henceforth since I ride brakeless most of the time, the last thing I need are more distractions. I have a bunch of computers sitting around in my bike room right now, just collecting dust.
But really why should we care what other people do when they are on their bikes, the important thing is that they ARE on bikes and not in a H2 or some similar beast.
http://www.fuh2.com/