Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
The "add private note" pane, but it contains an "add strike" tool as well.
When an account hits a user-specified number of strikes, they're automatically muted or blocked.
One can annotate as they wish, or just increment the strikes.