I suppose it would be possible to preface all kinds of songs with remarks as to whether or not we apporove of the actions of the people in them.

"Now I'd like to say that I think Captain Kidd was very wrong to turn pirate."

"This next song is about three drunken maidens who pushed the jug about - but I don't want anyone to think I am in favour of binge drinking."

"Even drunken sailors should never be mistreated in the way described in this song."