hmmmm - i do find at times if I'm signalling to pull out from the side of the road and the traffic is quite busy, I can wait for a while until someone lets me out.
I do however (as a courteous person and considerate driver)
always let other people out in a long queue of traffic where circumstances permit.
I remember when I had the MINI 4 years ago, there seemed to be a craze that MINI drivers flahed their headlights at eadh other. I always used to get flashed by a black MINI going to work in the morning, with a small wave from the young, blonde female driver