"Since we know that dogs bite children at festivals". What? Every single last one of them? Sounds like a bad case of tarring everything with the same brush to me. See my observations about racism, anti-semitism, homophobia etc in my reply to Lizzie Cornish.

"So what do you do?" I keep my dog on a lead under proper control.

Following your logic. Since we know that cars kill people (what every single one of them?), shouldn't we be deciding whether we ban cars before or after they cause an accident? And shouldn't we be deciding whether to ban cars of their owners.

Then there's all the parents who fail to bring up their children properly. but that's another story.