Here in the state of Washington it is legal to defend your home or business from vandalism using reasonable means - including the use of a firearm. However, seeing as we still have generally fair elections (except for the ballots found in the car trunk to put the democrats into power) - I think that just leaving the vandalized building unrepaired until the elections would have a bigger impact.
Good psychology—it will wear on the democrats like looking at a mirror everyday reflecting their ugly visage. Democrats like to believe that they are superior to us. That they are better human beings who are more civilized we are. This would undermine their haughtiness.