Quick update: IE8 and Chrome both behave as expected, that is to say, no ads, regardless of login status. Looks like you got that one whupped a while back and I just never realized, Bob. Sorry for the false alarm. 
--sofaspud
--"Listening to your kid is the audio equivalent of a Salvador Dali painting, Spud." --OpMegs

--sofaspud
--"Listening to your kid is the audio equivalent of a Salvador Dali painting, Spud." --OpMegs