Red_Avatar: The ones we have alive right now surely would be. You think we'd keep 15 million pigs as pets in Belgium? (yes we have that many)
I think it might actually do more harm since having no need for certain animals anymore might well see them head for extinction, ironically. If you don't mind a species going extinct due to us no longer needing to them for food, I guess it's an improvement. And then there's such a thing as crowd control where hunters take down animals to control the population. Rabbits used to be rare 10 years ago but now they're a pest again so you're free to shoot them again. Are PETA so stupid they think animals won't stop breeding?
There is a reason why you can't kill someone who has only a few days left to live anyway. The whole foundation of the German law is based on the worth of human dignity (although politicians broadly ignore that in the past years).
What would happen if someone would proof that all animals have a soul (something that I believe in, by the way)? Would that make them eligible to have the same dignity? Is there a fundamental right of living beings to live for as long as nature gives them to live or should we kill everyone who has no further use for society, such as extremely ill people, murderers that spend the rest of their life in prison etc.? The very philosophical reason that we should respect life is that we want to be respected by life! The same, by the way, goes for respecting dead people - we also want to stay respected when we die. The pragmatic reason would be to kill them since they only do bad to others, even though they might not intend so. What makes humans different from animals? The soul? So if animals have a soul, what then? And who proves that other humans have a soul and are not robots? Is it wrong to kill at all?
Difficult questions but one must consider them if he talks about life.
With all due respect before nature itself, the very essence of life that we originate from, we should set our standards as high as possible. We should trust in nature that it always finds the right way, the balance that is needed for this planet's ecosystem to work.
Since humans have begun populating this world widely, the number of extinctions of species has raised so much that many people are talking about the sixth mass extinction - one that humans and other big mammals won't survive, but that might reset the nature to a status in which it can ultimately survive and spread again.
And yes, PETA sometimes is very stupid!