I agree, except the part about logging off being "totally understandable"
If you log in to Open you are accepting the fact you may be "dogpiled by a wing of A rated, fully engineered FDLs" so you still have no right to log. Those FDL's are not breaking any rules doing what they are doing so.
I agree with you though in the sense that i think rebuy is the main motivation for most but lately on top of that "losing my precious pixel crew" i would say is just as much of a motivation unfortunately.
I don't subscribe to the view that in the griefers vs c.loggers dichotomy, the c.loggers (as a result of griefing) is at fault. I think that's a pretty damaging position that is tantamount to victim-blaming.
Griefers ruin the game far more than the victims of such activity who see themselves as having little recourse but to combat log as a means to protect their progress and enjoyment of the game from people whose sole intention is to spoil other people's fun.
In all seriousness, I really don't care what FDev says about combat logging as cheating, provided they continue to sit there and do nothing about the systems within the game that allow the griefers to simply go buck wild with abandon in the game, with impunity.
I strongly believe that the community's focus should be on getting FDev to fix griefing first, before it starts to worry about combat logging. As I'm sure doing so will relieve the vast majority of cases of combat logging (outside of those who do engage willingly in PvP but don't want to have to pay a rebuy).
Personally, I think it's bizarre how this community seems to get so fixated on combat logging, which is a mere symptom of a problem, as opposed to the obvious elephants in the room that desperately needed to have been dealt with a long time ago; i.e. griefers (thus a real C&P system) and the high rebuy cost as an impediment to PvP.