I hope people don't see this tragedy and start demanding more regulations that will make it harder for people buy guns to protect themselves from criminals or to go hunting. Although the intensions of people who want more government regulation is good the outcome is usually bad. We can create laws that will make it harder for law abiding citizens to buy a gun but it will not stop criminals from getting more guys because by definition criminals do not care about gun control laws.
We don't ban fast cars or planes because car or plane crashes kill people but instead we make cars more safer to drive my deploying more safety gear in them. We can reduce the incidents of gun violence by creating gun free zones and screen people for guns before they get into schools, movies and other gun free zones. These screenings can be left to private owners / local community discretion. Metal detectors managed by private owners or just selective screening for anomalies by the security guard.
It's interesting to see left leaning people and liberals who believe in personal freedom and call themselves pro-choice wants to hand over their choice to government when it comes to guns in the hope that creating a law that bans certain types of guns will make them safer.
People should be free to keep guns at home for protection and hunting. Yes, some criminals and crazies will be able to sneak in guns but they would do that even if all guns are banned.