Great idea Tina, provided that your average visitor to the house has more that a nano-spec of that thing called common sense.
Last year, we had our drive replaced with that very expensive imprinted concrete (the one where they dye the concrete and then imprint it so that it looks like York stone).
Anyway, the day they finished laying it, we blocked off the end of the drive, placed planks from the pavement to the front door for access, draped 12 fluoresecent jackets over the barriers and put up signs saying "beware - wet concrete". Opened the back door next morning just in time to see post woman jump down off the low wall separating us from next door's drive and walk across the still-soft concrete. I shouted a warning and she took one look at me then down at her feet and then had the nerve to complain that her boots were covered in concrete. She had walked up our neighbours drive because she couldn't get access to our because of the barriers at the bottom.!!
I spent the next couple of weeks hoping that she would send me a letter threatening to sue. Unfortunately, she didn't.!
You just can't compensate for stupidness of some people,