I had the same thing happen to me with a Thresh yesterday. His hook comes out, I dodge to the side, and just as it gets fully extended, the hook graphic actually moved sideways about 2 champion steps and snagged me. WTF? I wish my morg Qs could wiggle (although I will admit, I sometimes must just hit someone with the outside corner of the box, cause I surprise myself sometimes. As Gimli says, "That was deliberate." >.> )
Anyway, was gonna say Blitz is my instaban...not because his hook is shady, but because I don't want to play a dodge-the-hook mini game all laning phase (I would go play some old school Atari for something like that), and adcs are focused on mins, so they are easily hit. He is just a bad champ. And them late game, he can pull through walls right into his team. And you don't have to land that many hooks to be effective.