I don't - and can't, with the limitations of this board - get too specific as to exactly with whom and for what I'd go traipsing over the "line".
Will I, for personal advantage, go rip your blog off and post it on IGS?
Yes, if you post on your blog "Well, self, I shall now post my doctored photographs of Vikarion kissing Sansha Kuvakei on IGS."
Probably, if you are using it as a forum for capsuleers to conspire against me. In that case, it stands to reason that someone could get access to it.
No, if you post "I plan to ambush Vikarion in Jita on Sunday", I probably wouldn't see that as something to cross the line on. But I won't be in Jita on Sunday, or if I am, it will be with friends.
No, if you post "I hate Vikarion, I hate him so much, I intend to humiliate him on IGS."
The difference here is when someone is injecting something I can't fairly respond to without going to OOC sources - in other words, I intend to be mostly reactive, rather than pro-active.
Now, if someone, say, gets legitimate evemails from me about how I plan to destroy the Amarr empire (which won't happen, the character is not genocidal), you have every right to post those - that's IC and in-game. I won't go to OOC sources to try to refute it, since it did happen. Make up those evemails with photoshop, however, and all bets are off.
Ultimately, this is a defensive position for me.