- There's a global blacklist of sites, as well as phrases in the title/URL (e.g. "bank")

- You can blacklist sites yourself

- Each sentence is run against filters checking for medical/legal/etc info, as well as checks for addresses, card/social security numbers, etc. All the checks are done client side

- There are also some special implementations, e.g. it looks at the source code of websites to work out if they're an instance of an American health portal that I've forgotten the name of - each doctor's surgery self-hosts it.

- Websites can add `nuenki-ignore=true` on their end, if they'd like to disable it.

And of course it doesn't log anything, though there is an anonymous cache in order to make it economical.