I think at one point we forget what little bastards we were when we were children, so when we see stuff like this it is shocking. But in reality, we were probably much worse.
Children are terrible
I would have been the kid sitting behind them thinking "those kids are so mean, why won't they stop"
I do regret that I very likely would have done absolutely nothing to stop them though.
If you really were like that, though.... It's good if people like you eventually decided "that's bad, I should be a better person and not intentionally hurt people like that" as you got older.... but kids that age know what they are doing, they are making a conscious decision to hurt someone, it's not a case of they just didn't know better. They are bad people. Being young doesn't excuse that.
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The batman villians all seem to be one big joke that batman refuses to laugh at - SantaRPG