Back then in my first answer, I wrote:
And that’s correct. I didn’t go into that stuff, because I never used any of this on my sites. However, I’ve been asked about adding social media buttons and embedded youtube videos and so I did a little research …
Oh boy …!
Basically: If you add any sort of Google services to your Website, you’re participating in user tracking. I didn’t bother to investigate what any of the other services do, I don’t believe anybody is better.
One could just declare their use in one’s data protection policy and I wouldn’t be afraid of lawsuits, then. However, even if this should conform to the letter of the law, it certainly goes against its spirit. More importantly, it would exhibit a “what do I care” attitude that I, personally, dislike very much.
There are solutions for that. For social media buttons, the influential German IT publisher Heise has developed “Shariff” (in English):
It should be straight forward to turn that into a plugin. For embedded youtube videos, I like the solution used by some public law broadcasters (like Deutschlandfunk): What you see on loading a Website is a placeholder box with the information that for data protection reasons you have to click before you can even see the video, thereby giving your consent to tracking. That would also work for Google maps. (Solutions displaying an image of the video possibly run into terms of service issues – they certainly do in the case of Google maps – and are not with absolute iudicial certainty secure with regard to copyright.)
I’m going to implement that, though it’s not on top of my TODO-list right now.
EDIT: In case it’s is of interest for anybody reading this: As for Google fonts – there’s no reason to use Google fonts at all. Fonts can and should be self hosted, Fontsquirrel, just for instance, provides free fonts for download and has an online Webfont generator for those who don’t want to do it from the command line.