This is the one and only reason that Vicodin and Percocet exist. They don't want people getting high, so they're punishing them by trying to kill them. It's barbaric. Literally evil.

Edit: just to be clear, there are times when it might make sense to take oxycodone or hydrocodone alongside acetaminophen, but they should be prescribed separately and with caution. The reason they're combination drugs is because the toxicity is a "desirable" side-effect meant to discourage abuse. It's that reasoning that is evil.