I think badcover is getting an unneccesarily hard time here...if these girls were indeed 'sturdy', they were probably quite intimidating in size to her DS.
I once asked a little boy if he would mind being a bit more careful around the babies in an under 3 softplay area (this child was at least 6 and was throwing big lumps of vinyl-covered foam around the babies' heads so I think I was being fairly restrained!).
No parent to be seen leading up to this. The minute I sat down again, this woman was suddenly in my face.
"Did you say something to MY CHILD?"
"Um.. yeah, I asked him to be careful."
"Don't speak to MY CHILD, I'll say something if it needs to be said!"
Now, I can do an evil stare myself with the best of them, so I looked her back and said in a calm voice "You weren't there."
"Yes I was! Yes I was! I was over there"
"Well, it can't have been close enough to see, or else you'd have intervened" "and this soft play is for under threes, after all."
"Come here, XXXX! We're not staying here to be insulted by this BITCH!"
And for the rest of the holiday I could feel this stare of unremitting hatred knifing into my back whenever she was around... freaky.
DD is now the same age as that little boy was and I could quite see her doing exactly the same thing if left unsupervised, with no malice intended. But she wouldn't be left unsupervised in an area not for her age group :)
Didn't put me off, though. I don't hesitate to police DD's behaviour and expect the same of other parents - if they don't, then I would always suggest to a child that they might not want to be doing that if I thought their behaviour was out of line...