Well, I hate to bring up more worries on the future of Venice, but there is interesting article in the Wall Street Journal about the Rialto Fish Market and its succumbing to the loss of real Venetian residents and the hordes of tourists. Not sure if everyone can access this but try atrialto fish market Its in today's (Dec 24) edition of my hardcopy WSJ. The gist of it is that tourists come to gawk but not buy fish, and the real estate is too valuable to waste. Residents can't afford to live there as developers need more shopping space.
Visiting the market early in the morning was probably my most memorable and authentic experience in Venice. We end up destroying the things we love.