For those of you who are still seeing banner ads-
Consider the possibility of installing Adblock Plus, a free download.
I was plagued by these from more than a year ago, and they started becoming more obtrusive as time went on. Obnoxious stuff too, bordering on a come-on for porn sites.
It culminated in obtrusive pop-ups that I've never ever had before, and didn't have any way of declining. I had to close the browser tab for BoB and open it again, and even then they would re-appear sooner than later.
I hasten to add this didn't become an issue on any other site so it looked like it was tied to the software that BoB launches from.
I duly took my 'puter to my local geek, and he pronounced it free of Malware and the like. He then installed Adblock Plus, and hey presto.....all the banner ads are now gone, along with the annoying pop-ups.
I would then advise without hesitation that if you are experiencing banner ads on BoB to avail yourselves of this. So far it's worked for me.
This has been a PSA.