Or the jury can just do whatever: http://en.wikipedia.org/wiki/Jury_nullification . We had a case like this in NZ a few years ago, activists broke into and damaged an ECHELON spybase, admitted to it but said it was for the greater good, Jury agreed.
Jury nullifcation is applicable in criminal cases, this was a civil case.
In civil cases the jury can ignore the judges instructions but if the judge feels that in doing so they've rendered an unreasonable verdict, he or she can issue a judgement notwithstanding verdict which essentially amends or entirely over rules the jury's decision.
