got one of these a couple of days ago. i forgot which thread, but only happens to a specific page in a thread.
It's completely harmless. I believe other browsers will ignore it. It is due to a smiley that @LosPollosHermanos (I think) once used from the spurstalk bbs. He can no longer edit those posts though, so a mod has to intervene An HTTP GET request of the image is causing Chrome to think you are going to that site. It is being overly protective. Completely harmless