There is a difference between untrusted and unverified or informal. Do I expect visitors to my personal blog to have any security or privacy problems because I

There is a difference between untrusted and unverified or informal. Do I expect visitors to my personal blog to have any security or privacy problems because I use Google Fonts to make it look nice? No. Do I have any sort of formal agreement that is binding on Google to guarantee that, or that obliges them to notify me if they change their privacy policy in this respect? Also no. And exactly the same applies to, for example, numerous popular JS libraries that are hosted for free on reputable CDNs.