Yes. Of course if you end up in a row later on and one of you comes whining to me that you need the password changed, then the other comes complaining that the password was changed I'm more than likely just to kick you both out. If you share a password with someone, fine, but you're responsible for whatever happens, and I do NOT accept excuse of "but it wasn't me!"
Seriously, this has happened several times before, just as recently as last week even.