1) It's fewer bytes than most images, so insignificant bandwidth wise. And it's still smaller than the jquery script, which if you want to use the web uncrippled, you are probably downloading one of those a few dozen times a day.
2) I'm not going to try and decipher it all, but I don't think it does that much. Tracking is not very complex client-side. In any case, I guarantee it uses less processing power than your average flash ad, which I also leave on, or for that matter, just plain rendering a fresh page. Most of the time firefox doesn't use much CPU at all, AFAICT.
The only reason I can see to object to tracking is you don't like whoever gathering information on you. And I honestly don't care about that, because it is very mundane information.
Red is always an error on the Console, I think. Can you cut n' paste them?Err.. All the attribute strings are in red... Is that normal?