Nothing against anyone personally but that hammer method is not only unsafe for all the reasons mentioned, but it is a slippery slope. So on leverguns can you keep the lever just out of battery and your finger on the trigger? How about 1911s with the hammer forward? Bolt guns with the bolts retracted? Autos with the slide locked back? Pump actions with the pump slightly rearward?
And to top it all off, try keeping good weapon retention on the drawstroke with your thumb like that on a DA revolver...
And to top it all off, try keeping good weapon retention on the drawstroke with your thumb like that on a DA revolver...