Strange old world we live in. (especially if you mix this where this thread will no doubt go with the thread on speeding)
If you suggest to someone that what they are doing is wrong then sections of the community will have a pop at you for being a busybody. We are willing to let people break the laws and get away with things when we think the law is an ass (reference to the police a filth etc).
So i suppose that by extraploating that point if you think it is ok for your kids to "express" themselves in the community what right have others to comment if it all goes a bit too far?