Lets not necessarily pin this all on the snake just being mean. There could be environmental variables at play here.

These are 2010 hatchlings. How much do they currently weigh? What are you feeding them and how often?

How is the husbandry? What are they being kept in? Do they have hides or at least the ability to hide if they so choose? What are your temps and what are you using to regulate temps?

Any or all of these things if not as they should be could be affecting your snakes' comfort levels and contributing to these reactions.