I find that interesting as well, on a couple of levels. First, I don't know if you were like me, but when I saw the "light signal" the first thing I thought of was nerdy kid. So I am wondering if the MILF is going to break out with the barber and find his body there, then find out it was pusscake who sold them out to the commander dude. I hope he enjoyed that back seat booty, because I think that's all he's ever getting.
Second though, and I forget where I read this, but in response to someone saying something about a plot hole like "anyone who has ever seen a Romero movie would have known that in 10 seconds", Kirkman said that zombies didn't exist in this world before now, so there were no Romero movies. Which is a major reach, but it does make me wonder what the kid could have dug up.