"Ok i agree with the sheet and x. But it needs to be red X made out of like cows blood? Only so that if the building is over run the zombies will rip apart the sheet so there is no confusion of whether the building is safe."

"That's true. But how and where are we supposed to get the naval flags? And who knows all of the naval signals? I don't think this is the best solution either.

Anyone have any ideas about international symbols that everyone knows that we can use?"

"I got an idea!

why don't we hang a sheet in the window that says "safe" and do everyone a favor, when the zed is eating your leg, pull the sheet down with your last breath.

just throwing that out there"

"You have kind of answered your own question. What if the signal says "Safe" but it really isn't? Would you trust it?

But if you read the link, you will see that it includes a system for timestamping the signal. That way you can tell if the Safe signal is old, and therefore unreliable.

Without timestamping the signal, there is no point to it, because then it is untrustworthy."

"What has been thought of is some of the other states is that you place a I I on the door of the location saying ( cleaned out nothing here ) paint of any kind or color. and a O on the door that says your here and in need of help also in any color. and a X in any color saying Infected do not enter. as for safe houses most of them are saying the same thing with them " Don't say that this is a safe house directly " the indirect way is a marking of some type that says to those that know this is a safe house for the night. leaving something inside saying if you stay here then you will be found for those that might wonder in. cutting down on HQ locations being found by raiders as easy and helping cut down on contamination of just picking them up. "