In other words, someone is always going to jump up and down for your attention, willing to spew bs (sometimes mixed with fact), to slow you down and delay you. Being able to ignore it and focus on real issues is important.
If you filter something as bullshit, you should at least be able to say why it is bullshit, outside of just who wrote it.
It goes into how Democrats get mired in reacting / reading / responding to everything, when detractors are acting in bad faith to consume their time / fill the airwaves and media.
I recommend the book. It's great, short, and applicable far outside Democrats / politics.