This is why there is no such thing as being too careful, and why the old saying of "treat every firearm as if it were loaded" needs to be strictly obeyed.
In Michigan, a father unintentionally shot his 12 year old daughter a week ago while cleaning his handgun. She survived due to prompt and excellent EMS and ER service, but it's still unknown if the father will be charged. Whether he is or isn't, I can't imagine the guilt he must be dealing with right now, and rightfully so (IMstrongO), as he violated so many rules of firearm safety it's not even funny.
When I practice dry firing, I do a total safety check, removing the magazine, locking the slide back and visually inspecting the weapon. I also rack the slide many, many times to ensure no rounds are somehow in the weapon, that have managed to avoid detection.
Then, I only use snap caps, always pointing the weapon in a safe direction, ensuring there are no people in the direction of the barrel.
I don't care if people think this is overkill. I would rather be cautious to the degree of being accused of neurotic than risk discharging any weapon unintentionally, and I don't even want to contemplate injuring anyone or worse.
The one thing about firearms is that any round fired can never be undone. There are no mulligans. No do-overs.