Purslane is edible. I tried it. Once. Raw. Fresh.
Bleeyech!
Although I've heard there are some excellent recipes for it.
I'd sure rather eat Purslane than a bug though, not being like that some guy I once saw on someone's tv who parachuted down into some forsaken wilderness to survive for 3 weeks on basically nothing. That guy ate bugs. I couldn't watch. But when he smashed open a cactus to eat the pulp, I watched. He chewed on weed seeds and leaves. One of them looked like a Purslane. Probably was.