There is a potential for AD's with the Glock, but this is somewhat overstated.
In other words, it can happen, but it's not something that "just happens".
The "problem" is that the Glock has a short trigger pull, coupled with no manual safety.
Revolvers and many modern double action autos like the Kahr have DA triggers and no manual safety, but their triggers have a much longer trigger pull before the gun will fire.
The Glock has a comparatively short trigger pull, and it's possible to inadvertently pull the trigger by mis-chance.
Examples are cases of Glocks firing when holstered in older thumb break-equipped holsters. The thumb break strap would curl over and would go into the trigger guard when the gun was pushed into the holster. As the gun was pressed down, the strap would activate the trigger.
Other cases involved people carrying Glocks without a holster that covers the trigger guard.
A case in point was an officer carrying his Glock in the hip pocket of a pair of baggy pants. When he slid across the car seat, the Glock trigger caught on a seat belt attachment and fired.
All that's required to be safe with a Glock is to ALWAYS carry it in a holster that's equipped with a covered trigger guard, and one that's specifically designed for a Glock pistol. The generic, "fits most" type holsters may not safely accommodate the Glock.
Above all just remember: If the trigger is pulled, the gun fires.
This is true of all guns, but because of the much shorter length of the trigger pull, the Glock isn't as forgiving as other designs.
The Glock is no "safer" or "un-safer" than any other pistol.
All that's required for safety is to pay attention, and insure the trigger isn't inadvertently pulled.