I agree with you 100%, Big Al. People will sing what they want and that is fine by me. My only concern is the 'they' part when talking about the new songbook editors. Who exactly are the 'they' who will have the power to decide what is pc or not? What 'they' think is offensive may be quite acceptable to others.
Imo,songs should be published as per the original (i.e. as written by the composer or as trad). The singer should decide the format of any song he or she delivers.