Check rule 2 if you wanna know what types we do not allow. Rules: https://hellclan.co.uk/motd/jb.html - rule 2 All of them.
if it gives you an advantage, its not allowed. If you want to bind space to a foot pedal for accessibility I'm sure its allowed. I'm sure the admins wont be too keen on a windows accessibility feature being exploited to give you an advantage.
Anything, that gives you unfair advantage against others in our servers is bannable. Why do you want to use this?
I think he just wants to get away with having and advantage, but because its an "accessibility feature" he thinks it should be allowed.