I mean this is a thing that can be done. I don't see the point of it too much, since it's already something that can be enforced. If someone is using LOOC to RP that's basically IC in OOC which is against the rules. I use LOOC to ask people questions sometimes as a living person and a ghost, because I personally want to avoid using discord as much as possible. I could absolutely use discord/forums more.
I've had some LOOC discussions with people before. Nobody has ever pointed out it was a problem. If anything I'm saying in LOOC was a problem in any way, I'd hope people would mention it.