Re: [spec-reviews] Browser Fingerprinting Document (#38)

I have some concerns:

 * the recent [TAG Finding on Unsactioned Tracking](http://www.w3.org/2001/tag/doc/unsanctioned-tracking/) appears to be more actionable regarding how we might guide spec/feature designers in specific areas like storage mechanisms
 * Best Practice #1 in this document seems to guide in an ambiguous way. What's "unnecessary"? Who decides?
 * Best Practice #3 and #6 seems like the strongest, most actionable advice.
 * Reducing available entropy and storage (BP's 4, 5, 7) seem as though they're either deeply confused or are unsupportable as general principles. We discussed this in the Unsanctioned Tracking finding and these points appear to be incompatible with that finding.
 * Perhaps BP #8 might have some relationship to @mikewest's new work on Clear Site Data?: https://w3c.github.io/webappsec/specs/clear-site-data/

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https://github.com/w3ctag/spec-reviews/issues/38#issuecomment-140752032