You haven't said anything that runs contrary to the problem at hand. NPCs can have their agendas, but interference in PVP to this degree, especially in low sec, is not appropriate in this game. Players are not meant to get protection, or assistance, from NPCs in low sec. It's never happened before in the history of EVE, and every now and again when someone suggests on these forums the ability to hire NPCs for protection, they get shut down for the same reasons that the current NPC mining response fleets are a problem due to negative standings acquired for killing players in that NPC corp.

Let me remind you that the negative standings I have with DCM are largely the result of killing players in that corp, not for going after DCM. I have no problem with DCM. They are NPCs, what kind of problem would I possibly have with them?

Easy fix is for NPC's to cease all activities when player with negative standings warps in so that he may gank in peace. Once he leaves, NPC's may go about their business.

It makes sense that a player would lose standing for killing capsuleers in a corp.

Just as killing capsuleers in a player corp causes antagonism.

In this way NPC corps emulate player corps.

It would seem it will be applied to a great deal more than just that 1 NPC corp.

None. This would be the root issue.

That's one solution. Another would be to drop players to "no corp" when not in a player corp, and apply taxes based on their empire standings. They can still be afforded protection from wardecs as a non-corporate freelance entity, but with all the drawbacks of being in an NPC corp, like no property ownership (POCOs and the like). Another option is to give players a choice of NPC corp to join, with each one affording unique benefits and penalties (balanced of course) depending on their speciality. Another solution could be to simply remove standings loss for killing players, which is something that's bugged me since forever anyway, because it doesn't make any sense, mechanics wise. Sure, you could argue that a player corporation might drop your standings for killing their members, but the corp I just got done wardeccing, Honk Squad, are now mutually blue to each us because we had a lot of fun. Player corps have that option, to set each other blue after blowing each other up, as well as to set each other red, or just ignore each other altogether and chalk it up to "**** happens".

I only wrote out two options in the OP, because it was already long enough, and I was hoping for discussion based around recognition of the flaws, hashing out other solutions, and eventually getting CCPs attention. But now, as I said earlier, I just don't care anymore.