They don't get the privilege of having their data analyzed and used to market products back to them.

Some of the marketing people on here will probably find that to be horrendous. Where is my relevant promoted content?!

If most geeks end up blocking GA (in most cases without realising it) then the audience of geek-focused content might end up being severely under-reported to publishers. This will only accelerate the mainstreamification of our culture.

You ought to be supporting publishers that are important to you with your dollars, not with HTTP requests to Google Analytics.

You're right. We should all start reading all our spam messages and actively buying all the products we can tolerate. Otherwise, the spam will only be for crap we don't like…

Not directly, but it will affect the webmasters of non-commercial non-advertising websites if such block-lists become a default.

If you've ever implemented GA, you know that Google has put a lot of effort into making their implementation extremely efficient and asynchronous. I personally think they should be rewarded for being considerate towards users' time and resources.

I see no reason to reward a mugger just because they're efficiently taking the money out of my wallet. Yes, they might get me on my way minutes faster than the less-professional muggers out there, but I still don't like the process or end result.

Arguably the sites they visit will be receiving skewed analytics against their particular use-case, so the site owners won't cater to their needs as much. That said, I still block GA.