I know a really good local bas guitarist, good singer, good musician all 'round. He plays mostly a four string fretless, (great sound). And I've seen him slap a capo on the thing! I was floored the first time I saw it, and thought, "no self respecting bassist would ...." then I realized that was the point; he was a damn good player - he didn't give a sh*t what any self respecting bass player, or anyone else might think! Whatever the advantage he sought by using a capo, he got. It worked, it sounded great, and who cares!

I still get a chuckle outta that.