[bsnss-mn-cdr]

Items like this will always be a never ending battle. Each time one side has to update their technology to stop something from the other they normally must gain more authority from the other. In the case of Facebook that will be asking for more rights into each website that wants to use the 'Like' button and with the recent privacy issues this will just kick the hornets nest all over again.

[prodigal_erik]

I see it as a battle between "the browser is a reliable tool for reading and navigating documents on the web" and "the browser is just another UI toolkit for trusted desktop applications". It can't be both, because any seamless UI will always be powerful enough for untrustworthy code to find other malicious tricks like this.