How in the world does that work? I'm too old to have caught that wave, but I have a younger sister, and it's not like the snaps her friends send her go poof into the ether if her phone isn't on the network when they are sent. They've got to get queued up in storage on a server somewhere, they've got to get sent to her phone, and I assume, checksummed to make sure they didn't get corrupted in delivery, possibly resent?

I mean, I hope SnapChat isn't keeping photos, or else they'd be sitting on one of the largest collections of child porn in the world...