For Sync, “filter” and “block” are separate functions, blocking a user or community will also block them on the site you use, but filtering them only removes the posts locally on Sync.

I believe you’re correct, all 5 pixels of that tp seem to be visible

Incorrect, a chicken strip is the unused part of the tire closest to the wall. Meaning the rider has been too “chicken” to lean the bike over far enough to use the full tire.