Agree that this isn't a big deal unless your DD does, but I wonder if you're worried that the boy is saying "Miss Muffet, [go] away," which is kind of hurtful.

P.S. I got that Dice reference and instantly felt ashamed of my teenage interests. Let's stop before we talk about why Little Boy Blew...

I think the little boy probably is playing the part of the spider! Tell your daughter to say that she's not scared of him and that she'll squash him like a bug if he keeps bothering her