I love demonstrating the dangers of them to the people who insist on their presence.
First I poke my neon/led into the L&N holes which of course doesn't get anywhere near the live parts, then I put the plug in but upside down and make sure it's right in and do the same test with the screwdriver which lights up. Next I pull the cover out with a well practiced upward jerk only to find the earth pin stays in the hole where it rips off the cover.
Oops I say... then explain it's what the children do with them and finish it off with another demo with screwdriver
LOL, Behave x