"The tyranny of the people with a chip on their shoulder and time to burn"?
One is reminded that it is the chip in this case that has brought us to this point.
So successful has the computer been that we have brought instant world-wide communication to the very fingertips of the most exquisitely misinformed people you could find. They have done nothing but show up. They swarm in their dozens to spout off the most on what they know the least about, learning nothing along the way. This takes up much of the air and bandwidth in the room leaving the rest only enough to sigh.
If they were engaged in the world they would have some relatable experience. Alas, when they succeed only at typing their confidence mounts as their hair and fingernails grow. They are wastrels, the electronically dissipated.
Not so pithy but to sum up this will be:
The tyranny of the minority with the time to pack the world with the loudest opinions. The roar of ignorance.