I drive a BMW and use the indicators. I also give space to learners too as I was one once. The actual car is irrelevant, it is the penis brow driving it that makes it a weapon of death. People who sit right up your arse are clearly crap drivers as they are unable to see the road ahead to carry out a safe overtake. I think that Hyundai drivers are the new BMW drivers as they don't use indicators and do 40 mph everywhere regardless. As for accelerating whilst they are alongside; if you can willingly go faster then do so, if not let the danger overtake you and laugh at their wreckage further down the road.