A great comment by Wagner James Au on the recent blog post by the Lindens cracking down on ad farms:
"Does this mean the Lindens are rejecting libertarianism as a failed experiment? Maybe. Just as likely, they're doing this mainly in preparation for the time when the Second Life servers will be open sourced. That's when the libertarians will move their unregulated banks, controversial sex, and other banned content to adjoining nations. The Lindens, by contrast, will offer a loosely regulated mixed economy, a market and society regulated and beautified by the Lindens."
Yes, it certainly feels that way. And that's not really a bad thing: with servers being open sourced, there will be other options (possibly even linked to the Linden Grid) which will cater for more, ahem, interesting tastes.