I live in the country, so it is quite common for people to come to my door looking for directions to some nearby house or business...I don't mind helping folk out now and again but for some reason the last few weeks I've had an influx of 'lost' folk who get ratty with me if I don't know where they are talking about, get ratty with me when I tell them they've just driven past the place they are looking for or don't even bother acknowledging I've helped them find where they are looking for...
...and don't get me started on the arsing treasure hunts which are run over the summer where we get a steady stream of people knocking on our door asking if we are such and such house 
Would it be unreasonable of me to laminate a sign and stick it to the front door saying I charge £5 for directions?
I probably am being unreasonable but I am 36 weeks pregnant and in no mood to be up and down to the door every 2 minutes
or maybe I should just affix a 'Warning, pregnant, moody and hormonal woman lives here...please ring bell with caution' sign instead 