Parents..please take responsibility for your kids

Tonight, I was eating at Cho Cho's, a popular Asian hot pot restaurant. A young family of 4 sat near my party. This family had two young kids, one was sitting in a high chair. This child would throw and drop items on the floor. In the end, there were napkins and food stuff all over the floor around the high chair. When this family finished their dinner, they left leaving a huge mess on the floor and on the table. I was really hoping that the parents would make an attempt to clean up the mess and was disappointed when they didn't. The staff then had to come and clean up the mess in preparation for the next party. Please, take responsibility for your children's actions.

Edit: didn't expect this kind of response. Just wanted to share an observation. Appreciate all the different ways of looking at this situation. However I want to make it clear: I am in no way blaming/criticizing the toddlers. They are young and they will make a mess. Its natural. I get it and do not question that. To those who may have misread my original post, please know that it was about the parents being in a public place and not cleaning up the mess that their toddlers left because the toddlers are too young to know any better. That's it. I know it's not a crime, I know I could have said something but for reasons explained, I chose not to. It's something akin to me eating at the food court, when I'm done, I take my tray and food scraps/packages away. Socially, to me, it's the right thing to do because it's a shared space and not my private abode. That's it.