In 2008, a lone gunman murdered 8 young students at an Israeli school (Mercaz HaRav massacre - Wikipedia, the free encyclopedia)
"The attacker was stopped by two Israel Defense Forces officers who were former Mercaz HaRav students themselves: Yitzchak Dadon and Captain David Shapira, who both dealt the fatal blow to the attacker with their personal firearms".
In 2012, a lone gunman murdered 12 people and wounded 58 others at an Aurora Colorado movie theater. The attacker was not stopped by anyone in the theater.
However, according to the Daily Mail (James Holmes: Gunman used police evidence bags as hand puppets as mother admits she had feared he was disturbed for years | Mail Online), "Torrence Brown, Jr. was in the cinema and one of his friends, 18-year-old A.J. Boik, was killed in the massacre. He plans to file a lawsuit and will name the theater, for not properly securing the emergency exit, and Holmes’ doctors, for allegedly prescribing medications, as defendants. The law suit will also name the studio Warner Brothers, claiming that Dark Knight Rises is too violent."
In Israel, people are given licenses to carry firearms (although, the right to carry is very limited) and, more often than not, are able to end an attack and stop the perpetrator. No one sues anyone after an attack.
In the U.S., there will be hand-wringing over too many guns and lawsuits blaming everyone for the murderer's violence. Instead, we need more guns in the hands of law-abiding citizens who are trained on how and when to use them. And we need fewer lawsuits.
To Mr. Brown - your lawsuit is an insult to your friend and the other victims. You had no problem going to see the so-called violent movie. Stop trying to enrich yourself at the expense of the victims and their families.