Let's all play the traffic leak game.  Try to find the most annoying traffic leaks possible and post them up... maybe programs will tighten up their tours and better track affiliate codes through their entire sites...
My first one:  The "members entrance" leak.
http://bangbus.com/t1/pps=testing123/
Click on the member's entrance link (as some surfers might do) and then click cancel (because you obviously don't have a membership yet).   You get a 401 page with the affiliate code BB401 all over it (obviously an affiliate code setup to track 401 sales).
The only good thing (from my standpoint) is that BB opens the members area in a new window, which means the tour is still there on a page.  The downside is that the user is likely to continue in their visible window.
Just a small one.  I am sure some people have some better ones to share... 
