Although I grew up with their recordings and have always loved them, Peter, Paul and Mary perverted a number of very singable songs, and made them so nobody can sing them together. I think the worst was "If I Had a Hammer," made even worse by Trini Lopez. Another is "This Land Is Your Land." People can sing along with the record or at a PP&M concert, but the damage PP&M did makes it very difficult for people to sing these songs together.
-Joe Offer-