The script tracks the adsense clicks . ( if there is an adsense window on the page)
I have no problem with the activities of the script, but others who are seeing it without knowing what it does are likely to make—and have made—a fuss about it, and as a result, I've been put in a position where I'm worried about the launch of my wiki. Regardless, it does appear to go against the rules, and so I'll forget about removing it.
I don't have AdSense and wasn't planning on ever using it, but if the script is going to be whiling away, I may as well make it useful by signing up.