Samsung Under Fire Over S Pen Design Flaw That Could Break Your Galaxy Note 5
The folks at Android Police
It's not a foregone conclusion that your S Pen will get permanently stuck inside your Galaxy Note 5 if you insert it the wrong way, though even if you're successful at removing it, there's a high chance you've already broken the mechanism that detects if an S Pen is attached or detached from the handset.
Is this an overblown issue? I'd argue otherwise. Sure, inserting the S Pen the wrong way is a careless thing to do, but it also doesn't require any additional force compared to sliding it in the correct way. At minimum, there should be some extra resistance to say, "Hey bonehead, you're doing it wrong!," and ideally Samsung should have designed the slot and S Pen so that it wouldn't be possible to slide the S Pen in the wrong way.
When debating bad design versus user error, it doesn't have to be one or the other. It's a bad design that when combined with user error can have catastrophic consequences. Keep that in mind if you own a Galaxy Note 5, especially when little Billy asks to borrow your device.