"Ponies are procuring those eggs themselves without permission" How, exactly?
By walking right in and taking them. In Owl's Well That Ends Well Spike was able to blithely walk into a dragon's lair and spend enough time gorging himself on gems that his stomach was visibly distended before the dragon who lived there came home.
Dragons presumably go out to hunt.
Would you take a baby with you on a mapping expedition for
your senior thesis, or into a cave to rouse a lion?
If it was a baby lion, yes.
We have evidence from the show that adult dragons
tend to react badly to other dragons
No we don't. We have evidence from the show of one adult dragons who walk in on Spike eating his gems, yet his initial reaction is to talk to him, and we have evidence of one other adault dragon that shows that ponies can wake up a dragons and try to steal their stuff, but even so, the dragon won't react violently until violence is acted upon him.
If anything, the show portrays dragons as vastly more patient and forgiving than ponies.
As to why one dragon let Rarity go, but the other dragon wasn't so forgiving of Spike, the most obvious answer is that Rarity's dragon was able to recover his treasure from her. Spike
ate gems, so there was no way for him to get it back.
repetition is apparently necessary. Draconic reaction
to thieves is not logical, it is instinctual.
The show contradicts you. Watch the episodes.
Here's Rarity helping herself to a dragon's hoard while he watches. His spines bristle when she starts taking stuff, but he listens to her flattery, and when she draws attention to what she's doing, he takes it back and lets her go. There's no irrational instinct here, and there's no violence. He takes his stuff back and lets her go.
Here's
Spike munching on gems in Owls Well That Ends Well. The dragon comes in and asks him what he's doing. Once it's clear that Spike has no good reason for what he's doing, the dragon draws his claws and spikes, but
doesn't attack right away. And even when Spike tries to breathe flame on him, the dragon pulls back with a "you're joking, right?" look before he responds with his own breath attack. Once again, there's no "instintive reaction" going on here.
Where are you people getting this "instinctive reason" and "violent dragon" nonsense? Watch the episodes. People are charging into their liars and blatantly taking their stuff, but even so they're favoring dialogue over violence.
Celestia wouldn't kidnap dragon eggs not because she couldn't fight dragons, but because it would be a massive pain in the ass for her to have to continually go kill (apart from returning the eggs, which is no longer possible once they've been hatched, this is the only real option for her) rampaging dragons
She's probably sending minions to do it rather than doing it personally. Or there may be a general bounty out so others who steal eggs know where to go. As reasonable and tolerant as dragons are shown in the show, if they come home one day to a missing egg, there's no reason to assume they'd immediately go on a general rampage.
Why would they possibly need dragon child-slaves?
What do they do?
Isn't that obvious? They're the communications medium between Celestia and the students of her school. This is shown in
every single episode. Why are you even asking this?