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Gold. :-)

Should probably be https:// though!

Why bother? They're gonna just share your info with everyone anyway ;)

https://github.com/panzi/SocialSharePrivacy

You can see an implementation of it on Schneier blog: https://www.schneier.com/

Heise Shariff is one. I've been happily using the typo3 plugin of it for years.

A lot of German sites have two buttons. One with no tracking that pressing it causes the "follow up" script to run, and then the "follow us" script that tracks you.

You can just put a regular link to your fb page.

See Bruce Schneier's blog for examples.

I think Mozilla might be doing just that.