Don't think so.... I would expect it to be seized.
BTW... there was six outlets in my cabin. That should be enough.
-2 at desk
-2 at bathroom
-2 behind tv
If your unapproved device starts a fire in open waters. The mouse is the last thing you should be fearing.
Keep in mind, some ships are older and built way before cruisers had so many electronics. The wiring may not handle the excess current. I had sparks fly when I plug a camcorder in a cheap hotel 20yrs ago. I respect electrical safety rules since then.