It's long been a favorite of mine. We studied it in my senior English lit class. I once won $50 from a couple of guys in a bar at O'Hare airport betting I could sing the entire lyrics by heart.
However Don McLean has never indicated any particular interpretation of the lyrics; it is all in the ear of the listener.
Yes, that's what I read, too... There are numerous interpretations of his lyrics, but he never "officially endorsed" any of them, nor did he ever offer his own. Ingmar Bergman was this way, too - sometimes even said that he himself did not know, just what this or that part of his film mean.