Are you guy's seeing "Ad Choices" highlighted wording inside the response script?
Or are you using Ad Choices?
In my past experience when I've seen those it's because of an unsolicited virus or program (PUP file) in the computer or server.

 

I recently noticed the same. For me on this forum only. I use an iPad with an ad blocker and it's still there.

 

I don't see it, probably because of Weblock