I'd consider myself high-rep (in terms of server fault anyway, but not on other sites), but I've asked some pretty dumb or reallllly edge questions (herehere herehere or herehere for just a few). These questions most likely aren't much use to anyone except me, or the complete newbie.
On the flip side, I'm constantly seeing great questions being asked by low-rep, new users. (I'm also seeing a lot of terrible questions too, but that can only be expected).