Clear and to the point

L'Oreal cosmetics test their products on animals.

Is a little eyeliner worth blinding, confining, and killing rabbits?

To rabbit heaven? I honestly couldn't tell you...
I don't know why you posted that comment on my little ad. If you've got a problem with animal testing you're not going to get far preaching your thoughts to me. Go protest outside their testing facility.
Ya, animal testing/cruelty does suck. But it happens everywhere. If you don't like it- do something about it. Otherwise posting it on here is just a waste of our time.
Oh, and Penelope absolutely doesn't need makeup. But it sure doesn't hurt, does it? ;)

If I was advertising something like, oh let's say, slavery- something everyone can agree is wrong- would you comment on it? Could I claim I was just advertising and that it's ok? I do plenty of other things, I just happen to see these ads online.

Don't take it personally. I commented on every ad I saw on the page about L'Oreal to say they fund animal cruelty. I have no problem with you. Just them.

Kind of hard comparing slavery and animal testing. Talking about cruelty to humans and cruelty to animals. Neither is right, but one is more wrong than the other, at least in my eyes.
I don't take it personally, but I think you do. You're taking things out of context. I didn't make an ad for animal testing, I made an ad for a company who may or may not use animals for testing.
Furthermore, if you have no problem with me, just them (I assume you mean L'Oreal) why don't you find a way they can reduce if not eliminate animal testing and pitch it to them. You won't make any difference in their processes by posting comments on here.
I respect your opinion and agree with it, but this is the wrong place to bring that issue up.