[TOGoS]

Except that flashlights are easy to find in any gas station, and NEMA inlets are not.

Yeah, it's dangerous because some kid might take that double-male cord and plug it in somewhere problematic, but given the lack of obvious alternatives, I can understand why someone would do this. If we want to discourage it, we should make the correct solution more obvious and widely available.

[josephcsible]

How are they not widely available? Home Depot and Lowe's both sell them.

[TOGoS]

Looking at my local Home Depot's website, they do have a few different options for NEMA inlets in stock, but the options are pretty limited, and they're all larger connectors, not your standard 3-prong connector onto which you could shove the female end of an extension cord (which is what I really wanted for my power-strip-with-detachable-cord projects; I can't really speak to why others might want a male-to-male cable).