Chris Guillebeau lists some things they have no right to tell you:
Here’s my subjective experience, which I will now objectify for you as universal truth. My definition of success is the only one that matters, even though it has shifted over time in accordance with my unique journey through life.
I have no space in my brain to accommodate the fact that your experience might be completely different than mine.
Obviously, these are things I want to avoid on this site, as I coincidentally wrote about just yesterday. Funny how the Internet works.