This has got me scratching my
bald head for a while now

Why is it not possible to undo smiley or BB codes that one may have clicked on accidentally in a post they are trying to create? With CTRL+Z It's sort of convenient, you know, especially if you have been used to typing in different sorts of apps on PC.
Was the undo (CTRL+Z) option disabled on purpose? Or can our script guy (PowerGlove) make some patch?

Interesting that someone decided to ask about it LOL. It's sometimes very painful.
I will assume it's a default setting with SMF software. You will experience it with any other forum that has SMF running. Looks like you just challenged PowerGlove 😂