I’m in Big Al’s camp, I enjoy political songs - it was the ‘Protest’ songs coming from the US that first attracted me to the folk clubs back in the late ‘60s. But I’m also with Allan - I don’t want to be preached at by the artist between songs (even though I almost always agree with what’s being preached), and I definitely don’t want to listen to the artist arguing with the audience when he/she should be getting on with the next song.

If the song is well-written and well-performed, it will stand up on its own and needs no further preaching to make its point. IMHO, of course, and YMMV.