In the video in one of the above comments they showed how this thing fired because of a screwdriver touched the device and the outside of the atty together
ok, I don't see any video in the thread, but yes that is the problem with a negative switched, negative enclosure mod.
The mod enclosure is negative, and the switch contacts the negative to the body of the atomizer; meanwhile the positive is always on.
So in that situation if you accidentally contact the body of the atomizer to the body of the mod you bypass the switch.
If yours doesn't have that problem, maybe the body of the mod is isolated from the battery; maybe it has wire from the negative to the switch.