I went to an enjoyable singaround/open mic in an Edinburgh pub a few months ago. What if I had heard that song sung by a floorsinger whose name I didn't catch?

Or alternatively, what if I had heard that song sung by a floorsinger whose album I bought, who I then credited in a version I later sung, which was listened to online by someone who subsequently went and listened to that floorsinger's album, decided they hated it so much that they never wanted to listen to folk music again. Swings and roundabouts.