Not sure if this has been discussed before i couldn't find anything on search so i thought I'd post it.
I was wondering if it would be worthwhile to be familiar with using hobo signs. These are makings that where left in areas by migrant laborers in the early 1900's. They where used to alert fellow Hobos to potential help, warnings, and resources. For instance an x with a closed top and eyes means its a safe place to camp, 3 diagonal slashed means means the area is unsafe, 2 with a line under it over a 10 means there are crooks in the area, a circle with two arrows pointing right means get out quickly, and many many more.
I was thinking in long term situation with a wide spread affect like a PAW or major SHTF it could be helpful when you need to alert others in a variety of ways. It could help other travelers who may need something bad. It could also help if you needed to leave a quick message to any companions you have in case you had to go ahead of them.
Personally i think a new set of signs would be better as some of these can be duplicitous and there may be some things that would need to be covered that aren't because it was mainly used for traveling laborers.












