Even I, who am used to handling all manner of reptiles and other animals, keep hand sanitizer with me in the field for use immediately after, for example, rescuing a turtle.
Yes, the kids are told to wash their hands. But, between touching and washing, clothing can be touched, as well, so the problem does not go away. Even hand-washing should be done for several minutes, with high-grade antiseptic soap (which young children may not do).
By all accounts, McKay did not intend to break the law. But, neither he nor his manager was able, for whatever reason, to determine that there even was such a law. And, I'm sure that he, like so many others like him I've encountered through the years, thinks he is not hurting any animals.
Just a week later, in Toronto, we found out how wrong such self-proclaimed experts can be. One hundred fifty alligators, crocodiles, and caimans were transferred from a "home" in Toronto (where keeping such animals is illegal) to a reptile zoo in eastern Ontario. According to news reports, the "pets" grew too large for the couple who was keeping them in their home in an unnamed part-residential, part-light-industrial area of the city. The story is breaking as I type, and details are sparse, so it's uncertain if charges were, or will be, laid.