Commuters - Light up!

Although this seems like a rather obvious subject, I'm surprised with how many commuters (on road bikes and MTB) I have passed who had inadequate or zero lighting.
This is not limited to dawn/dusk times where some may argue that there is some natural light as I have passed some commuters at 9pm with just a single rear wheel reflector.

The 2010 National Light Up! campaign was launched this April and it highlights [boom, tish! ] another side to this seemingly idiotic practise (of not using the appropriate lighting) - offending commuters can get fined.
See http://www.bv.com.au/bikes-&-riding/41241/ for details on the fines.