The problem with your logic is size of the PvP player base. I believe it is probably smaller than the combat logging player base. If you go with me for a second, FD are not going to care about combat logging, ignore reports etc.
PvP needs some TLC, a much bigger thing of which combat logging is a part. I just do not think the PvP base is big enough to warrant the resource required, so more generic content is focussed upon. If I am right about the size, not sure how the situation will improve, need a player base to justify resource, need fixes to get player base etc.
Simon
The size of the PvP playerbase is irrelevant. If FD state in the T&C's that combat logging is considered an exploit and that action will be taken against offenders, then they need to take action against offenders. If they're not going to take action, then make that clear. That way, we all know where we stand and people who are buying the game for the PvP aspect of it can then make an informed decision rather than being suckered in by lies.