News from last fall, but applicable to this discussion:
http://news.bbc.co.uk/2/hi/business/3747580.stm
"Mexican writers and artists have joined a campaign to stop the US retailer, Wal-Mart, from opening a store near the famous ruins of Teotihuacan."
They're building on part of the site which is not legally protected but which is still, obviously, a part of the archeological site, as witnessed by the discovery of an altar when they were building the parking lot. I wonder what knowledge they've destroyed forever in the name of greed.