Hehe...well, no I have no 'moral' objections to it, but is its the easiest exploit of the AI I've found to date. Getting into a 'stern chase' with a missile ship is suicide and the AI loves to do it. A human player wont and will force the missile player to chase THEM. Also, human players will spread out their forces to form a 'net' that the missile boats cant constantly evade.
The AI is also incapable of bringing out ship designs to counter the missiles. Eventually it may have ONE PD weapon here and there. A human opponent will quickly appear with a small group of escort ships that will render the missiles nearly useless.
So, IMO, its really just something I'd like to see go away. It makes the game far too easy against the AI. Its not so bad in single player games as I can always choose not to do it (although I find that silly in and of itself). In multiplayer games though, the AI is simply doomed as players are going to use WHATEVER means are necessary to grease the AI so that they are at an advantage over the other human players in the game.
I've somewhat reduced the problem in my set by:
1) removing CSM's as a starting tech and tweaking the AI research files of the races that are missile dependant to get them early in the game. Now, if you want the missiles, you have to pay for em and if you get into an early conflict, its more difficult to come up with those RPs.
2) Added in a base level 'Early PD Cannon' as a starting component available. It is basically a PD-1 but it takes up 50% more space and can ONLY target missiles.
3) Upping the radioactives cost of the lower level missiles by a reasonably high amount. This means going for a seldom used resource and maintaining a stock of it. The later missiles have no increased cost (IMO, they are simply made more efficient). This has the effect of basically nullifying the missile weapons as cheap and quick cure all. Those missile boats cost a fairly heftly amount to build and maintain and reducing that cost means a substancial commitment to the missile 'tree'. For the early game, its not always possible to continually research a 15k tech.
Thats my $.02 on it.
Talenn