No its not true. Glocks have a safety its just not your traditional safety. Its not going to go off on its own, cam be dropped on the ground and its not going magically go off. Modern glocks arent double action, so it wont take 15 pounds of pressure to fire the bullet, but more like 4-6 pounds. Thats still quite a bit and way more than what you need to fire a bb gun, paint ball round, laser tag gun.
The four basic rules of gun safety are:
Treat every gun as if it's loaded: Always assume a gun is loaded, even if you think it's not.
Point the gun in a safe direction: A safe direction is one where the bullet will not cause injury or damage if it accidentally discharges.
Keep your finger off the trigger: Keep your finger off the trigger and outside the trigger guard until you're ready to shoot.
Know your target: Be certain of your target and what's in front of and behind it.
The irresponsibleness in your situation is the fact a gun was pointed at kids at all. You simply dont take your gun out to have a cowboy monologue of getting off my property and you certainly dont have you finger over the trigger unless you intend to fire. There is no irresponsible design here, only irresponsible owners.
Pervert