If you get anoyed at such a trivial thing you should not be on the road.
Near where I live there is a zebra crossing. I was walking past it one day, when I saw a lady who had been considerate enough to slow down, stop and let an elederly couple across. By way of thanks, the driver behind her, totally oblivious to what was going on around him went straight into the back of her. He then got out and gave the poor woman a load of abuse for stopping to let someone cross. It got rather heated, so I went across and pointed out that he was the one to blame. He told me to keep my nose out of the matter, so I gave my name to the lady and said I would act as a witness. He didn't like it one bit and gave me load of foul mouthed abuse. As he got back in his car, I made sure that he saw me take a picture of him and his vehicle on my mobile 'phone.
You are not the only person entitled to use the highway!