Wouldn't it be convenient to have an inspirtional-like item, which you could put in an urne/basket/etc. of your neighbour, working like a letter? Instead of wooden signs, which are placed in the land - and rather expensive - it could be a good idea to leave a message. Often, it happens to me, that I find a new claim, but the owner is not a home. Leaving a letter with a message (maybe some more characters than a sign has) which he can read later, would be very useful. It also would have an advantage in a village, if you want to leave a leaflet to your fellow citizen, to remind them to do something (like preparing food, fire, etc.). In these cases, signs are not handy.
And it would also give some style for all those raiders out there, who want to write a ransom note or blackmailing letter.