That's an interesting possibility, but it does make sense. The ability to send (but not receive) messages to other players could work as a vanilla type role, seeing as it doesn't allow very much sharing of game relevant information. Plus with two innkeepers in play it makes sense that this would give these roles some use if they coordinate with the innkeepers, though again to a very limited degree.
What are the chances of having 3 townies with roleblocking abilities in play though?
What argument do you have against lynching Notty beyond vibes?
To me it feels like people are going after Okx more because he's an easy target than anything else. Also, if he was actually scum I feel like he wouldnt claim to have the same role as a dead townie.