Why not? Everything else is. No, but seriously: Anybody have any experience with this?
I've got a couple of extra buckets I could try this out with.
NOTE This is really interesting:
Donald Rutledge, a construction project designer and manager in New Braunfels, Tex., devised a triple-pulley system so he could easily hoist his nine upside-down planters 16 feet above the ground, away from ravenous deer. He made his planters out of five-gallon buckets four years ago, following instructions on the Internet. “The tomatoes and basil worked real well upside down, but the lettuce, peas and carrots weren’t so successful,” he said. “It’s been trial and error.”
We've got a huge deer problem up here; in fact, I had a conversation one of the gardening ladies walking by, who said she'd given up gardening entirely, the deer were so bad. So she might like this technology.