If someone pushed their cart in front of him at the grocery store checkout and said "I hate lines. This is just how I roll." I wonder if he'd be OK with this ot

If someone pushed their cart in front of him at the grocery store checkout and said "I hate lines. This is just how I roll." I wonder if he'd be OK with this other person's "expectations" of behavior. The argument that acting "professionally" is an act or compromise we must try to avoid is bizarre to me. I dislike compromising over all sorts of things but having manners and not just doing everything or acting in a way your impulses desire is much of what it means to be an adult than an adolescent. Forget the term "professional" even, let's just go with "courtesy" or "having manners." Fake, they may be, but people who act upon negative impulses in public whether sexual, violent, or even just bad language aren't typically going to have a good time.