but as others have pointed out it is possible they could have damaged the property and made them unsellable. It would be tough to prove all they did was poor water on the pigs, even if they can reclaim some water and test it.
I think some people here are applying terrorism charges essentially, when it may not have been, but it certainly could have been, but I suppose one would have to prove that in court if they wanted that kind of harsh sentence. Throwing water on something is pretty harmless, but someone trying to do actual harm could hide behind that sorta thing as well.