Unwritten rules that MUST be obeyed?

[Shades]

I'm pretty sure indicating is one of those 'written' rules lol but I have to agree - it's not done consistently enough.

[misty]

But if you are going to indicate DO IT PROPERLY!!!!!
seriously, prefer people who don't indicate at all, to those who indicate using the wrong blinkers! Not good. Especially on all the double laned roundabouts in Canberra. How hard is it to figure out that you need to indicate "left" to exit a roundabout (not 'right')????