I think Chris is in the UK, where they may be ahead of North America as far as tamper resistant outlets go.
Yep, I'm in the UK.
I'll do some poking around on my profile to see if I can get that to display properly.
+1 to what Daniel said. The earth/ground pin has to be half-way in before the shutters (covering L/N) open. I've tried pushing against the shutters with a screwdriver to see if they can be broken, but gave up before I managed it.
We also useCeeform, which isn't as safe, but those only get used in professional environments where everyone should know not to open the lid and poke something metallic into the holes.
[ramble on] We did once have a particularly unsafe Ceeform cable at a venue I used to work at. It was a 125A 3-phase (240v per phase) cable, so you can probably imagine it was a big one. We connected that to a distro with 9x 32A outlets.
Now, the guy that assembled this cable (and also did PAT testing around the venue) didn't believe in strain relief - the idea being that if the screws into the copper were done up properly, they should take the strain. Stupid. I think he was fired soon after this incident.
So, someone (not me) goes to connect the big cable to the distro. Picks it up by the connector, and the cable drops out. Fortunately, it wasn't energised.
There was a lot of cursing.
[ramble off]
Chris