I'd suggest totting up the costs for driving in (petrol, VED, congestion charge, parking etc) and then donating it to some worthy cause rather than pissing people off on their way to work just to feel smug about your commuting choices.
@Dammit started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I'd suggest totting up the costs for driving in (petrol, VED, congestion charge, parking etc) and then donating it to some worthy cause rather than pissing people off on their way to work just to feel smug about your commuting choices.