All jokes about taking a crap on a pook's head aside I think you are doomed to fail. Wild animals are driven to survive and obtain food. If your garden has food then all harassing them will do is make them wait until you are not looking before they come in and start destroying things. Ultimately you need to either kill them or keep them out with physical barriers like chicken netting cages over your veg plants.
However a bit of backyard target practice is always fun so try all the suggestions first.
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