Three
Tour Rookie
Removing your ball from someone else's sight is just another bad habit, time wasting affectation, that has crept into the game from people aping professionals. There is no good etiquette in that at all. You only remove your ball if you wish to clean it, or to remove it if in a band likely to be hit by another player. Not because they dont want to see it.
Lol.
Walk on the the green, mark it, clean it, put it back when it's your turn, unless it's behind someone else who's putting and they can't see it, or you're all miles from the hole. Been doing that for 30 plus years, no affectation, just the way it's done.
Can't remember the last golfer I saw who never marked his ball.