>>Their heads are smaller also, so if they do bite, the damage
>>probable would not be as bad.
I've never been bitten by a blackthroat, but I've been bitten by large savannas, medium sized Niles, and small adult arguses. The savannas and Niles are African monitors like the blackthroats, with similar skull and tooth morphology, particularly with the peg-like teeth and powerful crushing skulls. The arguses have serated, bladed, knife-like teeth for cutting meat. Even though the arguses were considerably smaller than either the savanna or Nile, their bites caused worse damage. For this reason I am thankful arguses are reluctant to bite in self defense.
There is an interesting story in Eric Pianka's autobiography about a student of his from South Africa who made the mistake of thinking knife-toothed Aussie monitors had bites no worse than the peg-toothed African monitors. He intentionally stuck his hand into the gaping mouth of a wild perentie, and came to painfully regret his actions. He ended up needing reconstructive surgery on his hand to get his full range of motion back. Apparently he had done this trick many times with Nile and whitethroat monitors and came away none the worse for wear.
I guess the moral of this story is that if you are working with large knife-toothed monitors, then your only option is not to get bit. With a few simple precautions this is an acheivable goal. I have never been injured by one of my large arguses. I attribute this to by being careful, being aware, not feeding by hand, and by using gloves when the situation calls for it.
Luke