SHUT ALL PETTING ZOOS NOW

Yes, children love being able to pet docile animals. They don't, however, love suffering an absolutely horrific kidney disease from E. coli. Of course not all children get infected, and of those, some recover without being traumatized for life. Regardless, the benefit, namely the first sentence of this post, is simply not worth the suffering, or death, of one more child. And that's not even mentioning whether the animals think it's a good idea.