Or if you're concerned as a user of a regular "safe" site... Google Analytics does all of these things: link tracking, hover tracking, media query tracking. GA or something like it is being used by vast swaths of the web. I don't claim it's the majority, because I don't know, but that's what I assume, that all sites are tracking (whether or not the site even knows it.)
In other words: Do you not want a third party (like Google) to have that data or the second party (web administrators)?
It's not bad for people to analyze how users interact with their site. It's bad when one entity (or a handful) can track you across the Internet.
So in other words, I don't mind Piwik and have considered sending in a patch to uBlock and others with a switch to disabled "locally hosted analytics" or something similar. Like the drive to push "ethical advertising", I think it's reasonable to permit some benign tracking as a way to coerce more sites into decentralizing user analytics.
My primary objection is automated profile-generation and identifier sharing - third parties don't need realtime updates on my reading habits. I like to think folks who run their own analytics aren't sharing identifiers with adtech shops, but of course can't know.
[1]: https://whotracks.me/trackers/google_analytics.html [2]: http://randomwalker.info/publications/OpenWPM_1_million_site...