Writing.Com General Discussion

Hey guys, its me again. =)
I have two more question now for you:

First: When i write a story or something and this is not for all ages, like under 13 oder not for teenager or just for 18+ or so,
does the moderators and administrators mark that or close it for these guys? and in connection my second question:
Can i write aabout all themes and things? I have so many creative ideas, so can i write all or does exist some where i dont can write about? like erotic, deaths, etc? so exist something that dont allow me to write and delimit me?

/edit a third question: how many people are registered on this page? i dont find it, just for information

I thank you very much.

Greetings