Or, we could get to the root of the problem and just make the "ASPSESSIONIDACTBCDSD" cookie not expire at the end of the browser session... (it's the only play.net cookie that does, ironically enough; have 7 other play.net cookies that expire at various times in the next 6 to 11 months.)
Oh, and if anyone's wondering, I accept cookies from site (though, not 3rd party cookies), and keep 'em until they expire. I abhore having to log into sites every. single. time. I open up a new browser session (because I tend to do that on a three-ish hour basis).