okay, I gotta get this out cause I feel like its important to understand Hancocks character and why he behaves the way he does when you first meet him, cause it seems like there’s some misunderstanding here (and also some pointing out the hypocrisy of an anti-tyrant killing someone to establish power).
Hancock is protecting you from day one. When Hancock kills that citizen in front of you on your first foray into Goodneighbor, it is only partially a display of power. Sure, hes a showy ghoul (now), and it’s a good opportunity to assert some semblance of dominance. But the reality is that he thinks hes saving your ass from a serious extortion/robbery, and also from potential life-threatening danger.
After you travel with him for a bit, at some point, he admits that he thought you were an easy target, looking like you were fresh out of the vault. He had no way of knowing your immense power (as the PC). Now he knows he was wrong, because he’s seen you in action- but what that does clue you into is that he recognized you as potential prey and, instead of allowing you to be taken advantage of and/or being hurt, he stepped in to prevent it. It’s also worth noting that Hancock gives the man a chance to back off before finishing him off. This goes along with his “protect those who need protecting, hurt bastards who need hurting” personality, which is something emphasized through his character arc. He does not abide by people who need help being left on the wayside. Everything he does and says emphasizes this, and his introduction is no exception.
Ostracizing the weak, ostracizing the “other,” is the motivation for what led Hancock to where he is now, in personality and in power.
Hancock is someone who wants to be proud when he sees himself in the mirror. If he allowed you to be hurt, he would be going back on his promise to himself and the principles that landed him where he is now. Making a show of it is just a way to make an example out of a bad person to hopefully deter future incidents, in a way the people of Goodneighbor would understand.
One topic with the original post: Does the OP not realize that offer is probably for a party and not for one person to consume?
^^^¯\_(ツ)_/¯ ^^^
Back to the original post again: McDonald’s portion sizes are larger in the US than they are in other countries. A small cola in the US is pretty much a large in the UK. The point still stands.