[qayxc]

These rubber connectors cannot be halt inserted while still making contact - that would only work with EU plugs, which have partially insulated pins for this exact reason.

If you try and half insert the other type of plug, you'd be met with a thick plastic body, but not exposed pins.

[iso1631]

There is literally a photo of a shuko plug half inserted into a relatively common European socket and a claim that the pin is in contact with the terminal.

Shuko are not as safe as they should be because they are easily misused.