Well... this one might qualify, because many people think of it as great, but I just can't take it at all... "There Were Roses"... what a heavy handed, clumbsy, overly sentimental, pile of crud...Now, I know I've likely offended EVERY Celtic and psudo-celtic here, but I'm allowed to have my own opinions and proclaim them publicly...
For my tastes, there's one good song about the garbage going on in Ireland, and it applies to the Middle East and just about any other "hot spot" I can think of... It's called "House Of Orange" by Stan Rogers...
"Donald Where's Yer Trousers" always sorta got to me as the Sinefeld (sp?) episode of folk music... pointless but kinda funny...
That's Been My 0.02