The 450 is banned because someone or other nearly crushed Chavo's face with his knee when he missed.
Shooting Star Press is banned as well, why I dunno. Maybe 'cause Kidman, always botched it.
The Piledriver is banned because of Owen/Austin.
All the rest of the moves that are banned its pretty clear why they are, you know, the slightest mistake could paralyze/kill someone. But that's not to say that they won't be occasionally busted out.
It was actually Kidman, crushing chavo's face with the Shooting Star, but here it is.....
NO MOVE IS ACTUALLY BANNED IN THE WWE!!!
Anyone who works for WWE will tell you that from management to the curtain jerkers.....the moves however are discouraged and beleived to be big impact moves that should only be used for big impact matches.
the shooting star as mentioned was discouraged from use shortly after the Chavo incident....keep in mind London finished off Kidman with a Shooting star to end there fued.
the verterbreaker has never even had an issued warning on it. When WCW was bought, Helms was discouraged from using it as it is a dangerous move, but he was never told he couldn't use it and did use it once in a Sunday Night Heat match. He never got in trouble for using it and has never used it since because he understands the importance of protecting the talent. Helms will tell you that himself.
the Piledriver is still used more often then people seem to realize. However the ones that are using it are experinced, hense no reason to ban the move when others agree to limit the use of the move. this also goes for the standard powerbomb move.
Edge's impaler was never even discouraged. He just started using the spear more.
Bottom line is, I hate hearing these people talk about WWE bans moves and shit. cause its just not fact. the facts are they discourage it for safety and to help create a bigger impact in big impact matchs. Because if a wrestler pulls out a piledriver out of the blue that he doesn't normally use, then you know its something special that the guy is stooping to that level to gain victory. And I agree with it. if every move was common every match ever show, you'd be pretty bored. this adds flavour.