There's a philosophical discussion here longer than a comment can afford but the bottom line isn't "code is not people". While I took GP's "wife" remark as a joke, I feel like you're implying that as long as it's "not people" it's a free for all. Like someone "exploring" how it feels like to spend your money, wear your watch, and drive your car.
Since this is a digital world, hacking doesn't have to lead to a loss for the creator. It can be done for your own intellectual pleasure and exploration. But making it available online to the general public is no longer exploration. So depending on the case you no longer have the moral cover of "I was just exploring".
But the time and effort put into writing that code was a significant part of their lives, and that code was only shared with those who agreed with their rules.