My Pod Point Wall Charger has a lock on it to permit charging. I wouldn’t say it would be hard to defeat though. As said above, there’s the isolator switch that I might use if I ever get to go away on holiday again :-). My box is configured through the app to only charge between 00:30 and 04:30, my 5p cheap Octopus charging hours. I plug in wnenever suits but nothing happens until 00:30.