The general rule for this has been no post 1950 politics outside the "pit" - a section formally entitled Political Pulpit, but only visible to the paid moot members.
Up through World War II is allowed outside the pit as history>
The use of allegory and inference to discuss modern politics masquerading as historical ones is a politics outside the pit infraction, which usually carries a posting ban.
Real world religions are off limits outside the pit. Period.
Game use is allowed in play-by-post areas
A partial exception is posted for the Twilight:2000 area.
A special allowance for political elements directly relating to the space industry is longstanding.