The concept is flawed at its root.

Why go through the expense of building a complicated self- destruct when keeping your mouth shut is FREE?

A gallon jug of gasoline ignites in a confined space. That, my dear, is a bomb. Be happy if you get caught for growing and the ATF doesn't have to be involved because you didn't build an incendiary device in your basement.

The steel chamber full of burning gas and plant parts, assuming that it was strong enough to contain the blast (which it won't be by the way), will be hot enough on the outside to ignite nearby combustibles. So either you get an explosion or a fire. I guess the answer to your original question is, do you want to get probation for personal use cultivation, or go to federal pound-me-in-the-ass prison for arson, at the very least, assuming you DIDN'T take half the neighborhood with you.

Since this thread falls under 'other crimes' talk, it is CLOSED. We are growers, not irresponsible fools.