Well, after skipping through the forum a bit more I didn't find anything about the rules or more specifically pm system yet. Of course the mods will be rather busy right now until everything is up and running but personally speaking, I almost exclusively rped in pms because for one it was private and also because I knew there was a possibility of sexual occurring. That's not to say I cybered or anything because that is exceptionally boring and dull, but having had the option to write out mature things without having to worry about offending anyone was quite enjoyable in my opinion. 

If it will be forbidden to do so in the future I will obviously abide to the rules but to be honest, it would be rather unfortunate. For now though I'll just wait a couple more days until everything is up and running. ^.^