I have 2 cases of this, my 1st was when we had 1st moved into our house, we didn't have central heating and it was bloody freezing so we brought our mattress down, lit the open fire, shut the doors to have a cosy film sunday untill the living room door flung open, there was my sister, bil, nephews and bils parents, who decided on a wim to pay us a visit to see what our house was like, I could of died. The state of the house was bad enough, but us snuggled up on a made up bed in the middle of the afternoon just topped it off! Still cringe now!
My 2nd was a colleague thinking delivering something by hand when I was on maternity leave, meant hand to hand! There I was, manky hair, shit tip of a house, 3 mnth old asleep, me in my pjs, knock at the door, thought to myself, bugger that, they'll go away, WRONG!
In she walked, "eeh did you not hear me knock?"
Couldn't exactly say, "no, i thought it was a giant bloody woodpecker knocking my door down, calling my name through the letter box"
told her I must of dozed off, she believed me, believe it or not, my door has remained locked ever since, ds is 3 and a half now ha ha ha
so no, YANBU, try an 8ft fence with razor wire around, that should get the message across! If not, 2 savage guard dogs...