See, actually, the whole Designated Community thing is what hacks me off most about the NARA/RLG guidelines.

I don't have one designated community for my IR. I have (potentially, at least) hundreds! In what universe am I capable of canvassing all these people -- periodically, no less! -- to find out what their needs are?

If you've got a highly focused repository, the usability guidelines are great. If you're me, they're flatly impossible to implement.