why are all the cigarette lighters always powered even with the key out of the ignition?

its frustrating on my 01 to always have to pull the power adapter for my dash cam out after each drive. would be so much more convienant if the lighter socket was key switched so the camera would just auto-shutdown and then I could hide the wires lol.

looks like I'll have to buy an aftermarket lighter socket and wire it to a proper keyed on source.