Ignorant or not, Adobe don't appear to object & you don't have any evidence to the contrary. Given enough examples with small known changes much could be deduced. Classic FUD.
Here you go:
"Adobe has removed the entire license agreement from the SWF and FLV/F4V specifications. The only remaining restrictions are on copying and distributing the specifications themselves and on the use of Adobe trademarks, including the Flash trademark. The copyright and trademark restrictions are on the copyright page of the specification. Developers are now free to implement what is documented in the specifications without restrictions from Adobe"
Open Screen Project FAQ | Open Screen Project