Eh, I dunno. I figure that since the person is in a position of relative authority, they should be around just a little bit here and there. If they wanna take a break or whatnot, that's cool, just let the other guys know something. "Hey yeah, I'm not gonna be around for ________ reason." Just up and disappearing without any word for three weeks or more at a time is just kinda strange. Unless, you know, your computer explodes. That's an okay reason for your disappearing.