Notice The Cookie Monster demo here is not used to blocked the Demos of the Sharebuttons on this demo site and it is running in Implied mode for Google Analytics, you can test it to see how it deletes GA Cookies if you decline cookies. Check Cookies in your Browser >> Clear them all for this domain >> refresh the page and then check cookies >> then decline and see them deleted. Also see the Div at the bottom of the Page that is blocked until cookies are accepted. There is no requirement to block Joomla! session Cookies, if you find otherwise, please share the source.