All energy is contagious. Including negative energy.
Most media is full of negative energy. Fear. Desire. Anger. Pride. This is the energy your absorb when you consume most media.
If you want to see negative energy pass from one person to another through the internet, just go to any Youtube comments section. And watch as these low levels of energy pass from person to person. Triggering one person after the next.
The news is full of the energy of fear. Instagram is full of desire.
So be mindful of your media diet. Unless you want to lead a miserable day-to-day life that is.