My boys have these shoes, they are called Heeleys. There is nothing wrong with these shoes in the correct environment but they should not be allowed in any enclosed public space (ie: mall, restaurant, grocery store, etc.) It should be posted on the doors of all establishments, that way everyone knows and the wheels can be removed before entering the establishment.

Luckily, my boys are more into wearing them when we are outside than they are when we go to enclosed spaces. See, these shoes just aren't cool looking enough for them anymore.

All it will take is for one of those children riding those shoes in a Wal-Mart store, fall down, get injured, and Mom and Dad pulling Wal-Mart through all kinds of litigation (not that they would win but fighting litigiation is costly).