Very interesting timing: a few days ago I created one in OpenSCAD for myself and my... daughter (not named "Molly" though) would accidentally hit my PC's power button all too often while plugging in a USB device.

For the power button is located next to two USB ports I use and, for whatever reason and although it's a very good PC tower, the button is ultra sensitive.

So I created a "not-molly guard" that "plugs" into the two audio jacks (which I never use and which are, also, next to the power button) and that only leaves a narrow hole and a guardrail of a few millimeters.

Printing it in black, matching the tower's lip where the power button is, and life is good. Already hit that Molly guard several times by mistake so I figured out I already saved more time than it took to design it.

As it's a small piece, it printed in a few minutes on the 3D printer.

P.S: AFAICT there's no software setting (?) to prevent the power button from doing what it does!? But who cares, I've got the Molly guard now.