My initial response has been to call attention to this and other liner note issues in my RARB reviews. But I wanted to do something more to help these artists before they head to the presses.
To that end, I just posted a very detailed article about a cappella liner notes. Any group seeking the best practices will have a free resource that's readily available to them.
I also made a plea to all the a cappella producers who frequent a producers forum on facebook, on September 30th, 2012 in which I asked them to take on this issue as well: