I don't see why there's a problem with role playing. We play on a MMORPG, I think RPing in game is fine. I've been a text based roleplayer for 10 years, and I think the same rules on forums should apply to players in game. I don't role play on FFXIV, but honestly it seems kinda fun.
1) decent grammar
2) be kind and respectful
3) keep intimate rps in private messages