The roadkill song is bound to offend some people, but it was poetic justice, combining two of Eric Bogle's songs. Not being a motorist, I have a slighly different perspective than most people do; I'm less likely to cause, and more likely to get a close look at, these little tragedies.
Some people will no doubt consider Eternal Flame to be blasphemous and I don't just mean C programmers.
There may be some who find the parody of Threes to be anti-feminist, but I'd urge you to be familiar with the original Threes before judging, since I feel I'm taking an entirely fair jab at the ruthlessness of the original song and story.
December of Cambreadth derives its dark humor by depicting the reindeer as being a lot more cynical than they are usually thought of as being.