None of you have yet said what you find objectionable about advertisers' tracking cookies.
Speaking generally (and in no way suggesting pprune employs spyware), what I find objectionable is that there is no opt out from this stuff. Were it any other medium tracking behaviour, it would probably require one.
How long until someone hijacks a spybot to deliver a virus payload - probably not directly, but via a transfered site? . . .and before anyone says "impossible", there are some around now in which a clean email arrives asking you to follow a link and that linked site delivers the payload.
BTW, I am another very satisfied AdAware (free) user and if anyone wants a free firewall, Zonealarm is pretty good too.
(I have nothing what so ever to do with these products, other than as a user.)