I'm going to Gran Canaria, and I just wanted to know if it would be safe to take a two pin plug in my hand-luggage, as it might get damaged in my suitcase in transit.
You could put it into a small cardboard box to prevent damage if you really want to check it. That would prevent it from spearing anything else too. Or wrap it in bubble wrap. Or just shove it inside a shoe etc.
But I typically take a back-pack loaded with all kinds of cables and wires onto every flight. They make me take the laptop out, but that leaves about another dozen devices and a rat's nest of cables, trackball, headphones etc. The nice new color security X-ray units give them a crystal-clear view of what is going on, and I've never had any problems (sometimes they run it back and forth, but seldom even want to look inside).