[zwp]

Can an attacker use a formatting change to alter the sense of a document? Eg. make the text color the same as the background color or invisibly small?

[ben-morris]

Potentially this could be used to remove some content (or make it appear removed) without it being highlighted. I doubt this is an issue in practice, considering there's a full audit trail and collaborators are usually trusted, but this is good feedback and we'll see if we can improve this.