OP, you can fashion a plastic shield to go over the hose connection, trim a small soda bottle to fit over the hose connection. As for removing the back flow preventer, this is technically against the law (building codes), no idea of the penalties.
I agree with the comment of holding the hose on while turning the water off, this is very effective at reducing the spray.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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