I could see a utility company or township having some local rule written as something like 'running a hose between houses' being prohibited without any condition of intent to make it easier enforce when people are stealing water, and then using it against someone sharing on purpose because vague rules/laws tend to be twisted to punish people in a way far different than the intent.
Or it could be intentional in the same way as anti-homeless laws where people are just being punished for helping out the poor.