Well, Melissa, I think it's ironic that you, of all people, should find this, given that you've got a ticker in your sig.
I'm sure whoever it was with the offending ticker was completely unaware of any issues. Just another good reason to not allow users to post code (or even graphics) in sigs.
rayan, are you familiar with "cookie stuffing"? It's where someone includes a "graphic" in a post, even if that graphic is an unnoticeable 1x1 pixel clear gif. The image hosting site runs a script so if you load a graphic from there, you are served a cookie.
UU is now serving ads. Fact of life. I totally accept it as the price to use these forums for free so I'm not complaining at all.
Don't know your revenue model or how google ads necessarily work. But often the case is if someone clicks thru an ad on your site, a cookie is served, and the referring site will get a commission if the clicker makes a purchase within a certain time span.
Enter the cookie stuffer, who serves a cookie to prospects who merely view a forum page. So their cookie takes precedence even if a member clicks thru the ad on your web page. You lose out on any potential commissions.