You should start blocking the accounts that make a bijillion posts. Then (in settings again) that list of users will be available to give to others, if you want. (You can also unblock anyone on the list, to start seeing their stuff again.) I was going to give up on the site awhile back, but finding the "block" function made it so much better. When I refer people here, I usually warn them about how they'll have to sift through a bunch of garbage and duplicates.