You can already do that, RP's are not necessarily IC knowledge. If I RP talking to myself in my estate far from any prying ears, and use that RP to insult all and sundry, or even perhaps hint at plans like rebellion, that is NOT IC information for anyone else. The fact that there are players that ignore that doesn't change the fact that there are right now methods to do what you "fear" that should be pretty much free of IC consequences.
Well actually I think the rule is: if you post it for people to read, people can use it.
