I voted for three but only because I’m a weirdo/psychopath. So I’m thinking it’s a trap and will change my vote to one because my answer really is three.
They can be. I know of one drummer who has to have all the logos on the cymbals oriented the same way, as well as the logos on the drumheads. He removes the logos because playing obviously causes the cymbals to spin, messing up the alignment and it really bothers him...to the point where it affects his playing/mood. Yes, he has OCD and yes, he's able to manage it. Removing logos helps manage it while drumming.
*edited for grammar.