If you happened to have ever held a gun before or owned one, you would notice that all guns have a safety key which is turn on and off before making use of the gun. It's always in the best interest of the gun user to always put his or her gun safety on when the gun is not of any shooting use. This is the only way to avoid accidental discharge which if care is not taken might kill someone.
It's very much better to be on the prevention side than on the curing/treatment side. Always put your gun safety on.