polyfoam wont because it's a thin layer meant to absorb impacts not stop sharp objects from going through. Styrofoam would stop a stapler cause it actually has a fair thickness but no one uses it for phones and tablets while they do for larger screens like tvs and monitors.

I'm not trying to make you seem stupid but when i point out only 2 types of foam are usually used in phone and tablet packaging and polyfoam is useless against sharp objects penetrating and asked you if you know of a third one. You can downvote all you want but dude, youre making yourself look stupid by claiming the foam used for phones is going to stop a stapler

And even aside from that, should people who design packaging be worried about idiots using a stapler on boxes with screens in them or is that just user error? How much idiot proofing should they put into it. Maybe putting a sign saying dont cut too deeply with a pen knife when opening this box for packaging should be next.

I mean even for gamestop employees, only one branch was dumb enough to do this