Man I hope they are dangerous!!! If they aren't I'm going to have to learn to throw knives better. They are dangerous only when their user intends them to be or when a non-trained user starts playing with them. Store them properly and you'll never have a problem. Load a revolver with 6 rounds (or 5,7,8 or 9 depending) and then put it on a shelf and leave it untouched for 50 years. Unless I'm missing something and my S&W has a brain that I haven't found... it'll still be sitting there covered with dust and more than likely rusted up and inop at the end of the 50 years. A revolver is probably the absolutely LEAST likely to "just go off". It is in a state of rest, two actions have to happen to make it fire. You have to store energy in the springs (cock the hammer) and then release that energy by pulling the trigger or letting the hammer slip. A loaded and cocked gun of any make or model has the potential to go off regardless of how many safeties there are. Things can break, stuff happens and people can die... but then again, tractors roll over, trucks jack-knife, planes crash, ships sink, folks get cancer, heart attacks, strokes, stabbed, beat, drowned, strangled, burned etc... Face it LIVING is the most dangerous thing you will ever do. EVERY DAY you do many things that can get you killed in a split-second and you don't even think about NOT doing them. Risk management is the key... Manage the risk of that gun by storing it safely, getting some training, practicing regularly and not letting untrained and unsupervised folks have access to it.
ngh