Not sure I get this argument really...
PVP is not allowed outside of conflict zones in the group. That seems pretty clear, and yet you told another CMDR, clearly outside of a conflict zone, that you would engage in PVP if he/she did not do as you asked?
Are you saying that had the other CMDR replied telling you that "you can't as you're in Mobius," you'd have just sat there looking silly, or would you have actually attacked? Either option seems pretty strange to me. I'm all for role-play; but this type of behaviour seems to simply go against the group rules as the normal reaction from anyone receiving your message would be why bluff what's effectively a violation of the group rules, it'd be like bluffing to 'combat-log' in Open Play, i.e. a game mechanic that you can technically do, but that is 'against the rules' and would/could get you banned. This isn't role-play in the sense of the universe, but messing with game rules IMO. The obvious assumption to make from your threat would be to think that you must just be a 'bad egg' like some of the others who've been kicked recently.
I don't understand what you hoped to achieve by threatening another player with attack and thus breaking the rules, just doesn't make much sense to me... You either go ahead and do it, and are therefore kicked out, or don't and look silly for threatening something which in this group you simply can't do... Surely you must have known that you'd at least be reported for saying that you intended to break the rules?