Yeah a lot of the time it isn't done properly, the venom ducts are removed but not the glands. The ducts are able to regenerate, and are able to deliver venom to the fangs again.
I'm pretty sure that guy also has venomous snakes away.
He just obviously likes animal cruelty, you wouldn't take the muscles out of a constrictor so why take out the method venomous snakes use to kill? Hope he gets tagged by one that hasn't been operated on properly and looses an arm or something lol.