Locked

In the pursuit of a simplified life, I tried dumpster diving today, only to find the dumpster locked. Can anyone name this dumpster? Furthermore, why are the dumpsters locked? Is there a rise in folks rummaging through a store leftovers?

I was nervous around the local dumpster, and all kinds of thoughts went through my head, like why am I here? What does this make me? Why am I ashamed? This is a form of hunting and gathering. I can not help but think that there is primal satisfaction in this act.
I hear some posh stores in Asheville put food outside in carts for people to pick up.