Retargeting ads really need a forget me button, basically i was browsing for some "deck furniture covers" on http://www.potterybarn.com/ and http://www.westelm.com/ a few weeks ago (I dont know but i think maybe 30 minutes of general searching then placed the order.
Within 12 hours I noticed that i was continually being bombarded with "retargeted ads" for both companies, basically every 10th site or so i visited there it popped up again, and again, and again. Basically it is the same 4 or 5 ads in different sizes showing exactly the same product (that i'd already placed the order for) over and over again.
I understand that websites need to make money, and i understand that they get paid if people click on these retargeted ads (though personally i'm against CPC ads, i think all ads should be CPM which is why http://www.livechatconcepts.com/ prefers to display CPM ads, do you think FOX or CNN etc care if no one calls your 1800 number or visits you showroom after you buy their tv ads for $100k - nope, want to display then pay is my motto).
My issue is basically i bought the product already, there is no need to continue marketing to me, i just think there could be some real value in "Dont display this ad to me" anymore button.