I have yet to find a network that uses fingerprinting in that way. The use of ETags in the wild has been seen (KISSMetrics), but nobody has (as yet) had to reso

I have yet to find a network that uses fingerprinting in that way. The use of ETags in the wild has been seen (KISSMetrics), but nobody has (as yet) had to resort to fingerprinting from the client side since effective blocking of traditional methods isn't pervasive.