This is downright fucking asinine. I reread the thread, and clearly nobody acted like piracy is "the worst thing in the world." You're the one being defensive. Perhaps you just don't want to consider your own moral bankruptcy or confront your misplaced sense of entitlement. Just because some products can be tried out, rented, or purchased and returned doesn't mean the same is true of everything. It's not your place to say so if you neither produce nor sell the thing.
Comparing copyright law to slavery, domestic abuse, and hate crimes is disgustingly obtuse and hollow. You should be ashamed of your stupid analogies. And just because you disagree with copyright law or consider it unjust doesn't mean you get to break it. There is a process for changing the law, and you are ignoring it in favor of your own convenience, laziness, and cheapness.
I fully agree that publishers are generally greedy, demos and rentals are welcome, and industry leaders seem out of touch with what consumers want. I'm extremely anti-DRM, and I've studied copyright law in some detail to understand how the system has been shoehorned and strongarmed into gratuitously punishing offenders. But the sad state of things still doesn't give you the legal or ethical right to commit a crime. Fix the law, don't break it.
By the way, borrowing and installing a friend's copy could arguably also be considered illegal. It's just that enforcement is near impossible outside of install limits. Piracy is easier to track and prosecute.