Good for him.  Undoubtedly this will be challenged in court, since the gun crazies have many lawyers at their disposal.  But civil disobedience is the right posture, and Weinberg can afford to do it, literally and symbolically.  (He and his wife, who is a law professor at UT Austin, earn over $800,000/year; they are also both senior enough that they could retire in protest.  And given that he rather clearly the most famous member of the faculty, with an international reputation, even some of the yahoos in the state legislature may be given pause about the ramifications of driving him off the faculty.)