I have no clue why or how someone would attack really. I'm just assuming that it would be a burglary or something along those lines. Honestly, you're fuged regardless if someone with a firearm wants to harm you. The whole right to bare arms bullshit takes a big hit when you realize that we're currently allowed to purchase and carry weapons, and that law hurt the people in Colorado much more than it dead help them.
The law didn't hurt those people....a crazy sick fug did. A gun was just his selected means to unleash. Without the gun option.... He could of built a bomb (like in his apartment) and walked in to that theater. That is just one example. If a crazy person wants to harm people......gun laws aren't going to stop them.