Sorry to hear about your frog, Bill.
Actually, I feel a lot of the fault lies with the movie, T.V., music, and video game industry which had created a generation that has little or no regard for any kind of life, human or otherwise. I do not believe parents should allow their children to partake in this kind of sick "entertainment" (not my word)!
As a kid myself, i do not play all that many video games. I'm always occupied with something else, but i can tell you, i do know quite a lot of kids that WILL try to copy or imitate something they saw on TV or a video game. And the worst part is, these childrens' parent/s could not care less about what their child is doing. These kids i know walk around all day, pretending to be someone they saw on TV for instance, wacking things around with a stick. My grandmother feeds the local stray cat( if you want to call it that). Just the other day, i saw one of the neighbor-boys actually trying to hit the poor cat with a stick!!! Of course, with me being around this kids' age, i could not do much to help. It was just TERRIBLE seeing that happen. It's just that some kids have no respect what-so-ever, not even to their parents, on some occasions.
If some children could just, well, become "nicer" overall, the world WOULD be a much better place, without any incidents such as Bill's frog.
Hopefully, in time, the people who need to notice things like this WILL notice them, and hopefully approach their kids and "knock some sense into them!"