Ab is indeed riddled with adware and malware.
Its been flagged many times by macafee security center as a site of high risk.
On my computer.
Ive also in the last 10 days got something calle , lookingnation.com home.
I remove it with spybot , macafee, antimalwarebytes.
restart the computer and my home page is changed to this
http://www.lookingnation.com/
When its removed it shows up as hijack.homepage.
ive posted in the tech section and had no answers and cant find even googling a way to remove it yet.
ive now given up.
many other users have posted about this.
i believe , dabees i think posted this, that ab was bought earluier this year and since then the edvertising seeems more in your face and the adware is like a tidal wave of rubbish.
If anyone knows how to remove this homepage hijacker then point the way to the answer .