Definitely a darker shade of grey IMHO. Reminds me of the SourceForge ads shown on the download pages that have a big green "download" button. The ads usually display before the actual download button appears, and more than once I have accidentally clicked on it.

I end up angry and remembering NOT to deal with whoever was responsible for the ad.

However the difference I see to patio11's tactic is that in his case, people are searching for something educationally related and he gives them something related. That's different than me expecting to download a Java library and getting an anti-virus software page. So, still deception and therefore dark-grey, but not as blatant of deception as the ads on SourceForge.