I reported to dA that some of their ads had infected my computer twice. I explained that I didn't actually see it happen the first time, having been away from the keyboard, and that I was actually at the computer the second time but the ad appeared to not display (for all I know it was designed that way)... but since the identical activity both times was browsing through dA then that had to be my conclussion. I also mentioned that in both cases I had to restore factory settings to get rid of the virus and thus could not even retain a record of what was going on.
I finally got a reply. They asked me to fill out a form with as much detail about the pages I was on, the ads that came up, the time of day, and other information that I had already explained that I didn't have. If they had managed to ask me for this stuff within a week of my original report I MIGHT have been able to remember it. But since they only just now got back to me, I am making my departure my official reply.