I think the worst lead work is in "Eye Candy" by my band, the Greasy Knots. I just ripped off the solo from "Get Back" by the Beatles and added some awful tapping attempt at the end. I know none of you (except Michael) have ever heard this song, but someday you will, and then you will understand.

As far as songs by bands you might care about, I'll have to get back to you. I can only think of good solos; the crappy ones never seem to stick to my memory.