But... an infinite number of people aren't reading every page on the web, all the time. Even on Reddit, you're only really interacting with the limited subset of users who choose to comment, out of the limited subset who read a thread - which is still possibly bigger than a circle of friends, but smaller than any significant fraction of the human population.

There is the perception that "the entire world" is watching you on the web, criticizing your every move, but that's not a fact.