And not just in the post itself. But from being re-quoted, in the forum main page, and even PM's. The system I'm used to in vbulletin just blocks the original post, but you see the damn thing everywhere else. Can something like this be done?
The built in Ignore feature hides quotes, posts, and names everywhere. (If they are the last poster, it says "Ignored Member" on the home page). It adds a "View Hidden Content" link to show all ignored posts / quotes. I can only assume that this extends to Profile Messages / PCs (not certain on that).
Add-ons need to specifically code in the ignored content functionality.