@joergi We already have a couple of ways to opt out entirely.
I think it'd be interesting to have per-user allowlists and denylists, though. "Only boost my content when it has these tags: A B C D E" or "Always boost my content unless it has these tags: U V W X Y Z".
I think the way I'd do that is by turning the whole service on and off, then turning individual tags on and off.
PMs is a good interface, but I'll probably build a UI for it too.