I, also, have had this happen to me recently several times. Just another one of those things that makes a person say:"Huh".
WebRing - It's a way of life!
It happened to me a while back too. It happened while clicking on the "here" link in "Visit a complete list of WebRing memberships 'here'" on someone else's navbar. I reported it to WebRing. I Don't know if they've gotten to it yet. I used the "other" category to make the report, since none of the other categories seemed applicable. Offhand, I can't remember the details of what site, and ring. I thought someone might have installed a virus or spyware into a fake navbar.