I agree with you Res, although more on a fear basis. I'm afraid to let my guinea pigs go under the knife and under anisthetic. So I just make sure I'm responsible about keeping my male and my females seperate and if there ever was an accidental litter, I'd take care of it until they could be adopted out. I think if you have animals you have already accepted the responsibility to step up and do what's right.
I read your part about the female guinea's and just got this picture in my head of guinea pigs sneaking out the door and then sneaking back in early in the morning and an owner standing waiting for them with her arms crossed
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