gualse:
Images form 3-party server can track hypha guests. We should allow to disable images from 3-party server.
I can also suggest using CSP to prevent loading different kinds of 3rd-party content, including images and scripts.
I'm again suggesting using CSP to prevent loading different kinds of 3rd-party content, including images and scripts. In fact, I don't think this is in the scope of a markup language.
I retract that.