[He's grinning - even though she can't see it she can probably hear it in his voice. He is genuinely touched by her offer.]

Well, if anyone is ever mean to me, I'll definitely remember who to tell.

[He'll remember who to tell, but he prooooobably won't. He's a big boy, he can take care of himself. Anyway, he'd feel terrible if he got her into trouble.]

As for rude...well, sometimes someone might just be having a bad day, you know? I always try to give the benefit of the doubt. There's no telling what someone might be dealing with.