This seems to be the heart of the article: But in most cases if you witness something on Skype [...] there will be no video evidence to back you up. What is no

This seems to be the heart of the article: But in most cases if you witness something on Skype [...] there will be no video evidence to back you up. What is not at all clear to me is why adding the words "on Skype" to the middle of that sentence transforms an existing problem that society has lived with forever into an urgent issue that must be solved.