LOL I think this is the funniest thread I have seen yet. I am also guilty of the "what part of no didn't you understand" or "don't make me tell you again". Hahaha.. :o)) I have a gelding that pawed like a fool while tied until I got tired of it and tied him for an hour or so a couple of times a day for several days. He no longer paws, he stands quietly no matter how long he is tied now.
I used to have a mare that was a feeding freak too. No matter what sort of bucket I used she would throw the feed around. She was also one that would paw while she ate. The pawing never stopped but I ended up feeding her on a mat (4x8) and she never dug a hole but she always threw her feed. I would suggest having the horses teeth checked for a bad tooth.. that can sometimes cause them to be irritable during feeding.. sometimes not. ;o)
Good luck! If nothing else hire the little digger out as an earth mover!!