klunderbunker
Welcome to My (And Not Sly's) House
Again, they played loud music, danced, and cursed in front of you. You may have been annoyed by it, but as far as I can tell it didn't stop you from accomplishing what you wanted to at the gas station: either filling your vehicle up with gas or purchasing something from the store.
If you were on a train or airplane with this group of people and they were acting this way then, yes, it would be a problem. If they were cursing like that in front of a young child, again, I'd grant you that that would be a problem. But you're a grown man, and they were at a gas station close to midnight. There are a lot worse things that could have happened to you at this time than being privy to some teenagers acting like teenagers.
They were probably in their mid 20s. If they were teenagers I wouldn't have thought as much of this.