@josephcox Google should read their own response to Back Button Hijacking:
"Malicious practices create a mismatch between user expectations and the actual outcome, leading to a negative and deceptive user experience, or compromised user security or privacy."
When the user expectation is "do not track" but they track anyway, it's a malicious practice.
Google will begin punishing sites for back button hijacking in June
Google says it could penalize back button hijacking by demoting websites in search ranking.
Ars Technica (arstechnica.com)