I think the issue you express is with the battery discharge rate -- expressed in amps. If the resistance of the entire circuit is high enough to stay within the battery discharge rate parameters at battery voltage, no battery venting. Might burn the crap out of the juice and make the switch of the mech glow too, but the right battery can remain happy.
For room filling clouds, the relevant measure is wattage -- now much power we apply to the juice, and how much juice is available to absorb that energy. A crap wick and coil assembly can't handle 10 watts. A coil with large surface area immersed in a ml of juice can easily take over a thousand watts without burning or even producing much vapor at all (of course not powered by a battery). There's obviously a lot of in between. I'm not into ultra high wattage clouds, but for those who are, it's a matter of the right amount of juice in good contact with the heat of the coil. What's the limit? Well, what's the surface area over which you apply the energy and how much juice do you want to boil and vaporize? Lol.
I agree, however, that if a builder doesn't keep the limits of the battery in mind, a fire or explosion is in their future. I don't know if enough folks recognize that the internals of the battery include resistance, of course. When those low internal resistances become relevant (at very high discharge rates) they get hot, same as a coil would, for example. When a battery gets too hot it can go into thermal runaway and vent or explode. If it doesn't vent or explode, it will burn. These outcomes are all, in technical parlance, bad.