I don't have a rice cooker, and I've never heard of that. Crockpot yes, I believe I tried that a couple of years ago (I'm sure someone on the Dis talked about it).
There are some strange people out there who would rather cut a few dollars off the food budget by doing weird things like that. I missed the great Creamed Corn (or was it canned Corn) thread, it was before my time on the Dis. But from what I understand, someone here witnessed a family sitting on the curb on Main St eating out of a can of corn. Disers still mention it once in awhile. Hate I missed it.