They spray paint 'em black after they your factory to give you "plausible deniability." Either that or your one of "Them".
[adds another layer of tinfoil, causing my spine to compress from all the weight.....]
SPRAY PAINT? One does not SPRAY PAINT over hideously expensive aviation paint! And why would we need plausible deniability? Ain't you ever heard of 'product placement'? Most companies would spend major bucks to have their product in the title of a major movie (Black Hawk Down) or prominently featured in a huge blockbuster (Our lovely and affordable MH-53 Pave Low model with the optional "Shapeshifting Giant Alien Robot"â„¢ kit installed wiped out an entire FOB in the beginning of Transformers).
You can tell the ones that don't wear their tin foil. The mind control rays make 'em think black is green!
grumble, grumble, grumble...