Why does sixt.de hide they are stealing my history?

pricingResCookie.parts.js

// http://www.sixt.de/static/oi/js/pricingResCookie.js | 2012-11-08 21:56 UTC+2
// Loaded when visiting http://www.sixt.de Line 1178.
// Lines: 821-853 with decoded base64 in comments. 
// checkHistory() does CSS :visited based history stealing.
// The privacy policy does not reflect they are hitting my privacy with this. Somewhere deeper in the code they are 
// checking for: something-even-more-private.com? I dislike such stuff, how far do they want to go?
// German privacy policy under: http://www.sixt.de/informationen/datenschutz/
// I'm not a so happy customer anymore.

    	var ep = [
    		'aHR0cDovL3d3dy5ldXJvcGNhci5kZQ==', // decoded: http://www.europcar.de
    		'aHR0cDovL3d3dy5ldXJvcGNhci5jb20=', // decoded: http://www.europcar.com
    	];
    
    	var avhz = [
    		'aHR0cDovL3d3dy5oZXJ0ei5kZQ==', // decoded: http://www.hertz.de
    		'aHR0cDovL3d3dy5oZXJ0ei5jb20=', // decoded: http://www.hertz.com
    		'aHR0cDovL3d3dy5hdmlzLmRl',     // decoded: http://www.avis.de
    		'aHR0cDovL3d3dy5hdmlzLmNvbQ==', // decoded: http://www.avis.com
    	];
    	            
    
    	var prsvgl = [
    	  'aHR0cDovL3d3dy5iaWxsaWdlcm1pZXR3YWdlbi5kZQ==',      // decoded: http://www.billigermietwagen.de
    	  'aHR0cDovL3d3dy5taWV0d2FnZW5tYXJrdC5kZQ==',          // decoded: http://www.mietwagenmarkt.de
    	  'aHR0cDovL3d3dy5lbWlldHdhZ2VuLmRl',                  // decoded: http://www.emietwagen.de
    	  'aHR0cDovL3d3dy5tLWJyb2tlci5kZQ==',                  // decoded: http://www.m-broker.de
    	  'aHR0cDovL3d3dy5paHJtaWV0d2FnZW4uZGU=',              // decoded: http://www.ihrmietwagen.de
    	  'aHR0cDovL3d3dy5taWV0d2FnZW4tYXVza3VuZnQuZGU=',      // decoded: http://www.mietwagen-auskunft.de
    	  'aHR0cDovL3d3dy52cm9vbXZyb29tdnJvb20uY29t',          // decoded: http://www.vroomvroomvroom.com
    	  'aHR0cDovL3d3dy5jYXItaGlyZS1jZW50cmUuY28udWs=',      // decoded: http://www.car-hire-centre.co.uk
    	  'aHR0cDovL3d3dy5jYXJoaXJlc2VhcmNoLmNvLnVr',          // decoded: http://www.carhiresearch.co.uk
    	  'aHR0cDovL3d3dy5jYXJyZW50YWxzLmNvLnVr',              // decoded: http://www.carrentals.co.uk
    	  'aHR0cDovL3d3dy5jaGVlcGNhci5jby51aw==',              // decoded: http://www.cheepcar.co.uk
    	  'aHR0cDovL3d3dy5jb21wYXJlY2FycmVudGFscy5jby51aw==',  // decoded: http://www.comparecarrentals.co.uk
    	  'aHR0cDovL3d3dy5jb21wYXJlLWNhci1yZW50YWwuY28udWs=',  // decoded: http://www.compare-car-rental.co.uk
    	  'aHR0cDovL3d3dy5jYXJyZW50YWxzLmNvbQ==',              // decoded: http://www.carrentals.com
    	  'aHR0cDovL3d3dy5jYXJoaXJlZGlyZWN0LmNvLnVr',          // decoded: http://www.carhiredirect.co.uk
    	  'aHR0cDovL3d3dy5jYXJoaXJlZXhwcmVzcy5jby51aw==',      // decoded: http://www.carhireexpress.co.uk
    	  'aHR0cDovL3d3dy5jYXJoaXJlb25saW5lLm5ldA==',          // decoded: http://www.carhireonline.net
    	  'aHR0cDovL3d3dy5jYXItcmVudGFsLWhpcmUuY28udWs=',      // decoded: http://www.car-rental-hire.co.uk
    	];