The worst thing internet has taught to people?

I think the worst thing the internet has done is to desensitize people to the suffering of other people which takes away the ability to develop empathy for your fellow man. The second worst thing the internet has done is impair the ability to interact with others in person. Heck ,most people cannot even have a real one to one, in person, conversation anymore without looking at their smart phone constantly, which of course means they are not really listening to the person they are conversing with in person.