Well, don't. I mean, look: they're absolutely sure that something you dance around that sets you on fire is good for RP though the only place I've seen it used was in Tempest Keep I think in a raid consisting of mostly (unfortunately) people who don't roleplay.

"RP items" will be things like vanity gear with no stats. The ability to wear gear that you have but do not pass the requirements for but without stats, (i.e. mages will be able to wear plate but will not receive any benefits other than it looking cool). Stricter policing won't be a bad start either, I've seen people give up on RP just because nobody else around was doing it, and when they were, there was always somebody ruining it, not always on purpose.

What about that "report OOC button" I've been hearing about? What about a warning like "this is an RP realm" when you try to roll on one? Really simple things that could be easily implemented, have been on the suggestions forum countless times, but were not implemented, did not receive blue posts or any of that.

The question asked on the WWI was pretty stupid. "Special areas for roleplayers?" What? The whole point is that you can RP anywhere depending on your character and the storyline you're developing for it and those who you come across. Kind of like that time on the Blizzcast that they had a question about RP and it was about ... silly items?
Roleplayers look really trollable, while in practice they're kinda not. Then again, jerks like Athene don't help, I've seen quite a few Athene-like trolls in my RP life.