The only thing wrong with it is that we actually saw the alien. That was the step too far. We didn't see god when the ark was opened, we didn't see shiva when the sankara stones lit up, we didn't see jesus when the grail worked it's magic, but we saw a fully fleshed out alien at the end of KOTCS. Leaving it to the imagination would have been better. Other than that, the only reason people have a problem with aliens is because it doesn't fit the traditional confines of religious belief for the western world. I thought that it was a fine idea. No more or less ridiculous than any of the others. Less, actually because it's not a true deity. Just another mortal(ish) sentient being like us. Perhaps that's another spot that people have a hang up with. At any rate, I thought it was a bold and interesting idea. Besides, I don't care what anyone thinks, the crystal skull is the coolest-looking quest item yet, imho.
(Though according to Stoo it was edited out of at least one Indy film...)
