I entirely agree.BUT songs should be sung in character and if the song is American, giving it a light colouring (should that be 'coloring')of a mid-atlantic drawl seems as acceptable as singing a Yorkshire song with a little Yorkshire colouring or a Tyneside song with a touch of Geordie. Of course not every singer is an actor and sufficiently skilled to sing in character, many are just content to twang along on guitar or even do classy guitar accompaniments and treat the words as there simply to repeat without thought to the emotional content. However, Folk is a broad church and many people seem to enjoy this, just a matter of personal taste.