What a cool guy. Maybe you could try driving in a considerate manner and see how that goes?
i always let people merge in i slow down to give them plenty of space, merge lanes so im not in there way and not once has anyone on the road done the same for me, theres either no traffic or i need to force my way into a spot.
i do head checks everytime i merge but its useless as i can never see the rhs of my car, maybe im too short or something but yeah i drive safer then most other people i have been in the passenger seat for, if that makes sence