Other People's Brats

Portland is a great place to raise a family. There are tons of activities and places to go. Today we decided to celebrate Goldie's newfound status as a walker and go to the indoor park at the community center. There are tons of toys to play on and kids to see. The problem was that many people did not watch their children. Every time Goldie would find a toy, some other older child came and snatched it away. No parents anywhere around, but a slew of them against the wall talking on cell phones or engaged with other moms and dads. I didn't know what to do. I certainly didn't let G snatch toys even though she threw a fit. I don't feel appropriate disciplining other people's kids either. But I am determined not to lose the use of the park because of a few assholes. What do other people do when this kind of thing happens?