This code is on the MtGox page:
<!--
var _gaq = _gaq || [];
_gaq.push(['_setAccount', "UA-12152097-26"]);
_gaq.push(['_trackPageview']);
var track = track || false;
track = { ev: function() { var t = new Array(); for(i = 0; i < arguments.length; i++) t.push(arguments
); t.unshift("_trackEvent"); _gaq.push(t); if (this.parent) { t.shift(); this.parent.ev.apply(this.parent, t); } }, parent: track };
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(ga);
})();
// --></script>This means that by default, all visitors to MtGox are logged by Google, and as we know, it's not impossible that this information will be delivered to a third party, like for example NSA or other organizations in the USA. Then this information is probably used as input for algorithms that checks other data aquired about you.
What are your toughts ? Could not MtGox use their own stats collection system (I assume this is what they want to use Google Analytics for).
Edit: You could argue that you already need to send ID-papers to MtGox, so it doesn't matter, but I do think it does matter - as this information is then sent to someone totally unrelated with MtGox. Why should a third party need to know that YOUR ip visits MtGox ?