Back in WW2, allied bombers heading for targets in Italy often 'inadvertantly' entered Swiss airspace (short cut to save fuel)
One night the Swiss signalled to them 'you are in Swiss airspace'
Allied aircraft replied 'we know'
Then the Swiss said 'if you do not leave our airspace we will be forced to shoot at you'
Allied aircraft 'we know'.
So the Swiss started firing some AA which was well off target.
Allied aircraft 'your AA is well off target'
Swiss reply 'we know'.