Ugh! I hate seeing things like that. I'd be tempted to send some shame in his direction with a few well chosen loud remarks. Then, I'm sure you are a better person than I am, GC.
I think that stage can hit anywhere between 3-6. As with anything, you can tell a child it's only appropriate in private about a million times before it actually sinks in. Still no excuse for his behavior.
Mousewife, that is brilliant! Way to go with creative parenting!
