of course it's annoying, but I suppose it's a way that some sites can put up their advertisements for people visiting sites outside of their own -- at least, that's the only way I've seen it used apart from Google's use. I assume that any site just tracking outgoing users would log the location, remote address and other information and then redirect them. I don't think you should be using frames for this unless you have something to show your user, really.. and even then, like CornedBee said, frames are bad and this would be rather annoying.