Coming soon to an internet browser near you... Kinda inspired by groups like the Yes Men (though on a smaller scale) - N.U.M.P.T - E, or, the National Union of Motoring Press and Trade (Europe).
Thing is, it'll be less rabid than SafeSpeed or the ABD. It'll look 'respectable'. It'll be subtle. It'll be so-much-fun.
Also coming in early 2012... Bring Your Car to Work Day is going to be officially launched (to take place late August/early September once schools in the whole of the UK have been back a week or so).