Hi Gangplank,
DoNotTrackMe certainly is the way to go in case of new tracking code hacks and to stay clear of further tracking hacks or FPs. Of course avast should not have flagged this as there are a lot of users that do not know or care about in-browser protection and only blame a solutions when there is an issue.
I still am not aware of the reason why avast started to alert it, but these tracking codes are often benign hacks to enable multilevel browser user tracking.
There is always a grey area between acceptable user monitoring and privacy intrusion and there is always the possibility for FP alert interpretation with such code,
polonus