Great arguments made, I certainly would not be in favor of giving them out as a subscription reward, but rather as a ship or BPC purchase. Attaching them to other packages will only make them more common and they should be a rare and fun fight if you face a pilot with one.
The sandbox is already influenced with real world currency. Many players in nullsec inject directly into supercarriers, titans, FAX, and other ships to both help their alliance, and to try out new things. Another poster mentioned the effect on the economy, but CCP is doing a good job at balancing out the effects of injectors with the age of chaos.
They should be rare. The only free ships should be the reward for the tournament, which is effectively paid for with free publicity for CCP in the form of the special tournament variant of the AT ships. The generic hulls should only be available for purchase with plex, thus the introduction in the game be limited only by paying ccp.
PVE is already influenced by high end ships. Even if the PVE content is buffed and more wealth introduced in the economy, CCP can easily add more isk and wealth sinks into the game to counter them.
Finally, many new players are playing as alpha and switching to omega. The alpha to omega path works really well in getting people interested in the game and later paying for it. So long as eve continues to provide content for the newer players, and even helps add to highsec missions and other activities, the game will grow.