What if your kid was waching a kids channel and all of a sudden pron shows up????

this is the story my bro`s son was watching handy mandy on Disney channel and all of a sudden pron just shows up. my bro told his son to go to his room. when his son went to his room my bro was watching it. later he saw that it was not a peon channel it was Disney channel he called Comcast and they said it was an error. after that he switch to dish network. he tells this story over and over again. i`m just asking what would you do if this happen to you??????