Hence why I listed a few options. Maybe it's a limitation on the forum, but I would hope there would be some way of adding it in.
One example that I see on Reddit is they have mods that can upgrade specific posts to "mod" posts. For example, when you post about martial arts, your post has the same rights as any other post. But when you post a warning/announcement/update, you would add a "mod" tag/flag to it, where it cannot be ignored with the ignore feature.
Another is what I've seen used in every IT job, is a separate mod account. When I'm doing email, tickets, HR paperwork, etc., I'm using a user account. When I'm doing actual tech stuff like patching computers, I use an admin account. It wouldn't change posts that have already been made, but it could be used on posts going forward.
A third possibility is to do some sort of review and update the moderator list. I'm obviously biased in even suggesting this. And I know there are some users that aren't going to get along with any moderator, or are going to go after specific ones. However, I have noticed that most moderators get along with most people. There's just one or two that don't seem to mix well. In my biased opinion, of course. I've seen others have similar problems as I have had, is why I don't think it's limited to just me.
There are probably other ways to do this as well, which aren't coming to me at the moment. I can't tell you how much my experience on this forum would improve if I didn't have to actively ignore him. And, if he was afforded the same option against me (such as if he could ignore me on his conversation account and only had to see my posts on his mod account), I'm sure he might enjoy it more, too. I can't imagine that he actually enjoys talking to me. Unless he's just trolling me, in which case all the more reason for me to ignore him.