My rule is, whenever I find myself putting things into categories with names that are judgemental/subjective, that's usually a sign that my thinking on the subj

My rule is, whenever I find myself putting things into categories with names that are judgemental/subjective, that's usually a sign that my thinking on the subject is flawed somehow. Calling them "obtrusive" and "unobtrusive" scrollbars is just another way to call them "bad" and "good" scrollbars; it says more about the biases of the author than it does about the scrollbars themselves.