well while not a popular reply, here it goes:
Recently at work (I am a Network Administrator) we got into some copyright issues. Not within our department, but another department wanting info on what consitutes copyright infingement...
It all boils down to "fair and reasonable use"
Basically as it applies to us, the modeller... we are more than free to
create an exact 1/25 replica of a coke can, or bag of doritos, or britney spear's head... as long as it is for our own enjoyment, an educational project (teaching a group of modellers to mold the 3 foot 1/25 model of Britney Spears head) or simply because we want to. reasonable use being the catch word... it is for our OWN enjoyment... we can whittle, vacuform, cast, or scratchbuild as many of these things we want... even have them on our mantlepiece so visitors to our house can see them!
Now when I put that 1/25 Coke can in an IPMS competition, potentially viewed by many people is when it goes outside that domain... it is representing something to a group about the company...
Ok bear with me... second scenario... I decide my coke can is marketable... I want to produce this model so everyone can enjoy building "the Real Thing" ... suddenly I am flooded with calls about my product, several hundred, several thousand around the world want to buy my product... I decide to charge for the plans/kit... this is when it goes out of the realm of "reasonable use" again... I am making a profit representing a companies product, they, who researched, built, marketed and produced this product don't make a dime... I am exploiting their product for personal gain... making money on an idea that wasn't mine..
Now I agree with a lot of what was said here.... but if I whittled an exact replica of something that hasn't been done before... say a SciFi spacecraft of my own invention... and then I make some money off of selling the block of wood and pocket knife along with instructions... and suddenly I visit the SciFi forum here and notice someone mentioning "you can buy the Tom MkIII Obliterator at Joe's models" and go and look and BAM!!! there's my model... I'm gonna be upset!!!! someone is making money off of my work! I drew this out from a vision I had while smoking Peyote buds in the mojave desert!!!! how dare they!
I agree military craft should not be a licensing issue... the designs, the hardware, the craft I think (ok mabe not the designs) owned by the government... not the company... only the intellectual rights may be theirs... but essentially because the government owns the rights to that craft, I do too as the goverment is employed by me...
But as far as PanAm, Boeing etc... (ducking tomatoes thrown at me) they have the right under law to enforce the copyright... and the licensing fee really is not on us... it's on the model companies... who venture outside 'fair and reasonable use' and therefore must pay royalties, by selling the product representing their trademark... and of course they pass it along to us...