Saw an item on TV and then the below on the web about LTNZ thinking of making lights-on compulsory in New Zealand to help other motorists see bikes better and avoid hitting them. I'm not really for or against the idea (and both my bikes give me no option - the lights are already hard-wired on) - but generally prefer people to be free to make up there own mind on things like this.
On other bikes where I had a headlight switch I did tend to run with the lights on but then again I've been hit 4 times by car drivers and each time my light has been on. Having a light on will not stop a car driver from choosing to "not see" or ignore a bike...
No amount of rules & regulations will stop stupid people from doing stupid things - be the master of your own destiny and do not trust anyone else on the road!