^Yup. Like I said, the cartoon segments were where the show was able to cut loose with the Verhoeven-style parodic ultraviolence, since it was just a cartoon and thus could get past the censors.
I don't remember enough specifics to address the point about MetroNet/Diana's security. But in general, a lot of fictional crises would never happen if proper security or safety protocols were in place. It's just one of the accepted breaks from reality in fiction.