Seperating different age groups will make the communication on the side much harder and also excludes certain groups, so this is not possible. Everyone should always write in a polite and friendly way, and just as Kumiko said all conversations should have X rating, unless you know that the person you are talking to is an adult and is okay with stronger language.

Pease write your ideas in english (:

Is the timer working by now or is this still an issue?