I looked around about how to send my feedback to Google about display ad targeting - as a plain searcher, not a client. I came across something called Feedback. I saw my AdWords customer support requests there only, but I used it to send my feedback anyway and asked the recipient to forward it to the appropriate people.
Of all the stuff online, I hate this (re)targeting the most. I feel sooooo underestimated and offended when I see ads about some running shoes I already bought - all over the place. Heeeey, I finished with that two weeks ago and yet you're pounding me with those ads like I'm an idiot (originally used some worse words but pulled back). I feel so retarded when I see this happening and it happens a lot.
I use (re)targeting term all the time as I wasn't sure if it's one or another AdWords feature that does it.