Feature use scenario:
- I hover the mouse pointer over a username
- The small box that appears (the one that currently shows basic stats: when they joined, how many posts they have written, etc.) contains also a textarea field
- Whatever I write in that field persists between my logins, until I edit it again (if ever)
- The contents of that field are only visible to me
Motivation: As I read LW more, I'm starting to attribute expertise in some subjects to some users. And conversely, I'm noticing specific biases in other users. I would like to privately keep note of that, so that I can more precisely trust/distrust what they write in the future.