LOL! I do! Because they are even "do-able" for those who choose to adhere to a strict "harm none" philosophy, because essentially, they're not doing a spell against anyone, all they are doing is protecting themselves against what others are flinging at them. Technically, it's the ones who are flinging the harm in the first place who are harming themselves because all you're doing is putting up shields. ;D
Think back to the last of the plagues the Egyptians sufferred before the children of Israel were released. Moses told Pharoah that he (Pharoah) would determine the plague. Once Pharoah ordered the death of the first-borns of the Israelites, the fate of the Egyptians was sealed.