I dunno... Why don't you tell us why an adventurer, which should be friendly, is instead acting like a pedo bandit and ready to kill people the first time anyone ever showed them any sarcasm?
They don't need to be friendly or anything. But they can be expected to act within the law (to some degree. Assaulting a bunch of kids (potentially nobles) in a public place is bit ...
If it were in a dark alley or within a shady bar, I would be more convinced.