Originally posted by Alpha Kodiak: I assume that with target seekers off, the PDCs will still fire at seekers as they come into range, the ships just won't chase after them. Right?
Correct. PD will always fire defensively. That setting just determines whether the AI will move ships to go hunt down seekers or not. It's OK if your doctrine is to kill everything and you have a dedicated anti-missile ship. But it's disaster if your fleet is set to target seekers but not planets, for example, and you visit an enemy planet will a lot of missile platforms... ooooops.