My work firewall won't let me access this or the WDNorton forum, i presume they are low/no cost hosting and in return show some interest in the habits of those who log on?
No, you are not going crazy... I had the same series of full window Facebook and other ads that had no close button and when I would go back a page to try and get back to the forum, it was quite difficult and it often took me to other ads as well. It seems to be intermittent since most of the time I get the "usual" type of small ads.