That seems like a lot of work to continually lock and unlock that charge connection simply to save a little electricity. Because it gets a lot of regular use from actual hotel guests. If they didn't want others using it they should have just put a sign there saying, "For hotel guests only - We actively prosecute theft of electricity." I would think that would cause unauthorized use to fall rather dramatically and it would be a lot more convenient for hotel employees and guests.
But I guess making a sign is too much work.