[quote=@Cyclone]
But I suspect that I might be alone in the mentality that any influence of importance upon another's stuff should be done with permission. Maybe it's just because I like to plan ahead and having huge curveballs can sometimes torch a story that I was going for. Out of curiosity, what do the rest of you think about the degree to which we should require OOC permission to do destroy each others' stuff IC? Other than the fair warning rule, I don't think the OP's rules address this.
[/quote]

Depends on the stuff. 

If it's like an entire race, an entire faction, a Holy site, a Hero, or a Divine Weapon/shield/item/whathaveyou then you should ask. 

If it's a part of the race, a member of the faction (within reason. If it's a faction of robots and you want to corrupt a few of them it's gonna take a little bit of doing unless you hack or some such), or just attacking a Holy Site, hero, or weapon you have to ask shouldn't ask.