There is no criticism of children as kids will be kids.
Consideration towards others is what society needs, not selfishness
Well said OP.
India Knight wrote her own rant on this (I originally sent this piece to my MIL, who frequently bemoans the lack of even 'basic' table manners these days).... sorry if the pic is a bit fuzzy but the full link is behind the paywall.
I'm sure there are times when parents genuinely have to rush off, but as an ex-waitress myself, my advice would be that a heartfelt 'I'm so sorry about the mess', coupled with a generous tip (cash, if possible), goes a long way!