Ridiculous to argue about. I generally agree with Ron. If you don't like RUS, DON'T USE IT! I don't go singing without it, and wouldn't enjoy singing with any group so pedantic as to demand I do without. It doesn't stop me from learning songs not in RUS (some of them by (GASP) singer-songwriters), it just provides an easy fall-back and avoids awkward silences. I'm there for the music, after all.