Indicators are there for a reason - to let other drivers and pedestrians know what your next move is.
It drives me crazy the amount of time I see drivers sailing round roundabouts, or pulling out on motorways, or turning into minor roads - without bloody indicating.
I have no idea what they're going to do next, so either I'm waiting for them to go straight on (and it turns out they're turning), or I'm on the verge of pulling out (and it turns out they aren't turning), or I step into the road with no idea they are pulling in across me. BECAUSE THEY DIDN'T INDICATE TO TELL ME.
Am I the only person in the world that can see that indicators are not just a basic piece of road safety, a legal requirement, but also just good manners??