I set up a camera in the compost bin a few days ago and I've been watching a skunk visit every night for several hours, as well as raccoons. I've known this was happening for years, but somehow witnessing it directly spurred me into action. I watched a racoon walk off with an entire breakfast burrito. That's a lot of stolen nutrients!
I had some lumber left over from an indoor remodeling project, and some chicken wire, so I boshed this together. We'll see how effective it is.