It's spamming and it's not going to be stopped door u posting it on unrelated topics. If u think it needs to change, then actually do something about it, rather than sitting on your butt posting afbeeldingen on the internet. That's not how we stop things from happening.
Even if animals are completely equal to humans (Which I don't believe they are, but still), it could easily still be okay to keep animals restrained somehow for their own safety. We do the same thing with babies and cribs. Most dog owners chain them so they don't chase a car and get flattened. When that is no longer worse than confinement, go ahead and post pictures like that.
Actually, it is much better to keep a dog in a kennel then to chain them, if that is the only way to keep then safe. Google it if u can't tell that door yourself. But if u can't treat a dog like a family member, then u should not have a dog. If u chain a dog, then u should not have a dog, plain and simple. And I am not the only one who thinks that, there is a law against chaining dogs in some places.