I may be able to target those two elements (the arrows) in CSS, yes. It will be some hairy selectors and obviously more brittle than if we just put classes directly on those elements, but I probably get it done.
The harder one is to figure out if that user is ignored or not. As far as I can see, none of the parent containers add a class to indicate ‘ignored’ status for the quote. Without that class I can’t do anything different in CSS. What do you think? Please tell me if I’m wrong 