No way was I moving. He got in from the passenger (left) side.
I measure my response to other people's careless behavior against my own values, and the fact that I have a family and shit to lose in the event the first person decides to escalate.
Hell yes I get taken advantage of all the time. And what do I do about it? Usually nothing. I carry great privilege in this life, including race, gender, physical stature, nationality, geography, wealth, among others. I know the advantage I have over others well outweighs any advantage taken over me.
Now that I've answered your questions, answer mine: Do you think that in your life you won't be taken advantage of? Do you think that someone parking over the line is taking advantage of you personally? Do you seek revenge and retribution for every slight against you?