The Moon has no oxygen atmosphere, so how can something explode? Lunar meteors don't require oxygen or combustion to make themselves visible. They hit the ground with so much kinetic energy that even a pebble can make a crater several feet wide. The flash of light comes not from combustion but rather from the thermal glow of molten rock and hot vapors at the impact site.
For those that aren't aware, the original Deus Ex was released when pirated games were heavily distributed via sneakernet and usenet in the form of spanned 2 MB (or 2.88-- it's been a while) RAR images. Needless to say, this was a lot of diskettes for the games that were coming out on CD at the time, so the cracking teams would cut out every ounce of fat that they possibly could: cutscenes, non-vital sound effects, you name it. The games ran, but you were likely to miss a lot of story and fluff.
An early Deus Ex rip went through the same process, but for some reason would just stop at an early point in the game-- specifically, when you hopped on a police boat and sailed off to the next level. It turned out that the scripts used to drive the in-game cutscenes weren't designed to fail cleanly, and one of the missing sound effects caused this one to hang partway through.
People with pirated copies started complaining and looking for tech help with this baffling bug. It didn't take the devs long to figure out what was going on, and only took slightly longer for people who'd paid for it to start leaping down the throats of anyone asking for help getting past the 'buggy' cutscene.
A) People are easily convinced of falsehoods, and nowhere near so easily convinced otherwise when the truth comes to light.
B) Companies that can afford to throw tens of thousands of dollars/sterling/euros at someone for complaining about less than two hundred can just as easily afford public relations efforts to concoct and reinforce damaging lies about people they feel are a threat, feeding back into A.
In a nutshell: A lot of the crap you don't watch is ultimately funding the stuff that you do.