Thanks for that idea. Unfortunately I can’t do this as a user.
As mentioned before, I think we can close this topic.
It was news to me that tab and space is a thing to submit text, especially since I don’t use reddit or stackoverflow often enough to have noticed that they behave the same way.
All the UIs I use on a daily basis don’t do that, so after I started to use discourse more often, I noticed this behavior.
I’m a fully aware that the industry is not going to change its way.
All I am saying is that it is easy to invoke Submit by accident (which in my opinion shouldn’t be the case - accessibility or not. It’s even easier to make this mistake when you are disabled and can only use one hand, thus accessibilty features should make your life easier not harder).