1. What you view as a punishment, I look at it as protecting the public. All rights have limits and those limits usually are drawn at the point where personal rights have a negative affect on others. Clearly, when those who shouldn't have access to guns get access, bad things can happen. Every time one of these mass shootings happens, there are discussions surrounding mental illness and limiting the access of weapons to those who don't have the mental capacity to handle them. This is one way of reducing that access.
2. There are likely exceptions to the rule, but I have never heard of a gun owner ever being prosecuted when his/her gun was used in the commission of a crime by someone else. I believe that people would take more care in securing their weapons if they knew this was the outcome of not doing so. I commend you for locking your guns up in a safe, and think that if everyone did something like this, it would help to reduce instances in which the wrong people get their hands on guns.
3. I believe the penalties are not severe enough to deter gun violence. The penalties should serve as a deterent and, right now, the laws don't appear to have that affect. And yes, this would not deter a person who intends to kill and then take his own life.
4. Slow down law abiding citizens from what? There are numerous cases in which guns are purchased and within days used in the commission of crimes. Longer waiting periods might give some of these folks time to think through the consequences of their actions for, lets say, shooting their girlfriend after a breakup, or going into work and opening fire after not getting a promotion.
5. There were security guards at Columbine that didn't seem to do much good.
Columbine High School Had Armed Guard During Massacre In 1999
In 1999, Eric Harris and Dylan Klebold killed 15 people and wounded 23 more at Columbine High School. The destruction occurred despite the fact that there was an armed security officer at the school and another one nearby -- exactly what LaPierre argued on Friday was the answer to stopping "a bad guy with a gun."
Deputy Neil Gardner was a 15-year veteran of the Jefferson County, Colo., Sheriff’s Office assigned as the uniformed officer at Columbine. According to an account compiled by the police department, Gardner fired on Harris but was unsuccessful in stopping him:
Gardner, seeing Harris working with his gun, leaned over the top of the car and fired four shots. He was 60 yards from the gunman. Harris spun hard to the right and Gardner momentarily thought he had hit him. Seconds later, Harris began shooting again at the deputy.
After the exchange of gunfire, Harris ran back into the building. Gardner was able to get on the police radio and called for assistance from other Sheriff’s units. "Shots in the building. I need someone in the south lot with me."
The second officer was Deputy Paul Smoker, a motorcycle patrolman who was near the school writing a speeding ticket. When he heard a dispatch of a woman injured at the high school, he responded. He, too, fired at Harris but didn't stop him.