Uglification of bicyles by commuters seems to be simply a backlash against the expensive shiny bikes ridden by the lycra clad weight weinies. Most of the tricks cyclists use either weakly disguise an expensive bicycle, or ruin it. It is far better, in my opinion to resurrect a previously discarded bike for the purpose of commuting. Regrease dry bearings. Oil the chain. Rebuild the bike as inexpensively as possible, without caring about appearance. Then get a lock that will deter all but the most determined thief. It's all about the work to benefit ratio.
But if you want to explore bicyle uglification, here are a few links:
Ugly Your Bike
Ugly Your Bike #2: A Case Study
10 Uglification Tips
8 Ways To Ugly Your Bike
Junk-ify Your Bike