My blood pressure isn't rising. I'm superfit! So shall I take that as 'no, you can't justify killing innocent animals'?
I take it you're a vegetarian then? Ever been to an abatoir?
I shoot animals, it's a more humane death than you will find any meat on our supermarket shelves has been through. I also eat what I shoot because I have practically and unintentionally feeding what I shoot (they eat my home grown veg)
Eating what I shoot is better for the environment, free (less the cost of the pellet) and legal. This law is just enforcing what air gun (not firearms) owners should be doing anyway and is good news.
The OP is right, education is the key to firearms control. He came in here giving a heads-up on a new law which many havent heard about and you pile in to him about using firearms? I for one am glad of the OP's contribution.
Oh, and we dont call it field-stripping in the forces. We refer to it as stripping a weapon. 
Yes i am a vegetarian. Whether or not I've been to an abatoir is irrelevant, but yes I have.
Just because shooting animals is, as you say, more 'humane' than another form of death, does that still make it right? Is poisoning someone more 'humane' than beating them to death? If it is does that make it ok? Your justification seems flawed.
You say about it being within the law. Laws are made by man. There are many things you can do that are wrong that are not against the law. So this is irrelevant.
Why, just because we are more intelligent (some of us), and have more sophisticated methods of communication than animals, do some people think it's OK to treat animals badly? Imagine you're going shopping one day for food for your family, someone shoots you, your half dead, then they rip your guts out and throw them on the ground, you're definitely dead now.
You best tell Damon about the correct terminology.
Can you explain what you mean about piling into him? Whatever meaning you give to this, I think you are wrong. We have had a reasoned debate, with each putting their point across, so no I haven't piled into him.