I know the button is inactive, and I see that you are actually changing it subtly, but I think not enough.
I was just doing stuff in multiple browsers, came back and saw the big blue button and thought "oh, I didn't actually post that", clicked it, and then worked out what was going on.
Either make it a very faded blue, or grey, perhaps:

I know the button is inactive, and I see that you are actually changing it subtly, but I think not enough.
I was just doing stuff in multiple browsers, came back and saw the big blue button and thought "oh, I didn't actually post that", clicked it, and then worked out what was going on.
Either make it a very faded blue, or grey, perhaps: