Long time player and GM, PbP beginner.
Its your game, right? You run it, you have flks post how you want.
I have OOC threads so no one brings OOC into IC threads and ruins the 'feel"
most GMs have players use color for 'speech" Like this. some GMs get anal abouth which color to use? It doesn't matter, because no one can post in the excact same post as the same time. If yoiu hav 5 players using red for speech? it doesn't matter, because their post will be speerate.
I have people PM me Dice rolls, and keep them out of IC threads, sinc ei want threads to be more 'story".
Bottom line, Its you game to run, you make it fun for your players, and yourself.