XP Stoicism is a nice idea in theory, but in practice, I really don't think it works on every level. The General synopsis of this node would have to be 'we don't have to sanitize our ideas' -- it's a very good position. The problem is, due to people being human, it fails sometimes in its execution.
It's easy to say 'fuck reputation' when you're a level 9, because by then you have so many people already backing you that anyone disagreeing with you is in the minority. Chances are, people already respect you because of your level and the length of time you've been here. But it's a completely different story for the new user who joined last month. A new, inept user doesn't have the option of ignoring reputation because the whole user structure (not E2 itself, mind you) is based on level, which is in part based on XP.
I had the good fortune of becomming a part of the community long before E2 came around (we were still everything.blockstackers.com back then), and so there was no such thing as XP or C! as we know them today. So by the time I migrated to E2, I was already off the bottom rung and I didn't have to worry a whole lot. But for a new user, they will be judged mostly by their XP, and then by their number of writeups. We must never forget how hard it was for us in the begining.
So, practice XP Stoicism if you can get away with it, the database will be a better place for it, but don't judge those who don't. Reputation is like money: It's easy to say it's not important when you have more than you need.