Thanks for posting that link. I had heard of the ceiling tile theory before, but never actually read the full description. Let's just say for the sake of civility, it was "interesting" reading.
Let's start with the good...as Mama always said "If you can't say something good, then don't say anything at all". Ragnarok, there's a reason people call me "MacGyver", it's because I'm really good at fixing things. Whenever I have to solve a problem, I do an instant "feasibility study" in my mind, and think through everything that would need to be done, and what tools would be needed to solve a specific problem. I assemble the entire project in my "mind's eye" and look for anything that isn't actually doable, and it appears Hoffman actually tried to address some of the logistics involved with his theory. I really liked the fact that Hoffman considered adding an accelerometer to the RF detonators. With over a million devices, at least some of them would fail to get a signal, the accelerometer adds a backup in case the RF fails. So I thought that was a neat consideration.
However, everything else totally failed the feasibility test. To start. There's a reason you don't see explosives in thin large sheets. Spreading the energy release over a large surface area only dilutes the force created. Cutting charges do the opposite, they focus all of the explosive force of the charge to a single point, concentrating the energy, they are also are placed right up against what they are trying to cut. A large thin sheet of any explosive, take your pick, hung a foot or more away from the target (the floor trusses), would do nothing to structural steel.
Hoffman proposes that there were more than a million of these tiles. That means there were over a million individual detonators embedded in these tiles. When ceiling tiles are installed, some of them have to be cut to fit. Hoffman proposes these tiles could have been installed unknowingly by existing maintenance personal, and that the explosive film could be explained away as being some sort of fire protection or something. However, he neglects to address what happens when someone cuts into a detonator, and finds it. How could that be explained away? If there were over a million of these detonators, it is reasonable to assume some of them would fail. Why didn't they find any of the 100's or 1000's of failed detonators in the rubble? The explosions wouldn't completely vaporize the detonator, so there would be over a million semi-destroyed detonators in the debris, yet no one found any...why is that?
It's like Hoffman is going out of his way to make thing way more complex than they have to be. Rube Goldberg on steroids.