That unfortunate pairing that was suggested in another thread got me thinking - what's the worst opening band you've ever seen, and why?
I have two....."Hawaii" for ELP (I can't remember why they were so bad), and hands down, opening for the Black (Sabbath) and Blue (Oyster Cult) in tour in 1980,
"Satan's Three!" With their hit, "I just wanna box"
I'm sure there's more, but they'll come to me later.