I think from the surrounding stories we can see that this is in fact normal life and that he does not specifically need to get help for this. If it's not normal that people come by unannounced, then you do not need to learn to deal with that.
Of course, whether or not that is a healthy skill to have is a separate problem (I think it is). In this case your response is too extreme though.
Of course, whether or not that is a healthy skill to have is a separate problem (I think it is). In this case your response is too extreme though.