It's just TJB really.Absolutely. There's been a lame attempt at revisionism by some Aussies to absolve Smith of all blame. He definitely did a booboo, it's just that the punishment was very harsh.
Smith even admits in the press conference that they had talked about using it (not sure if 'it' was referring to sandpaper or tampering in general) to even things up so it's not like he was completely oblivious to all this.