@Leadfoot,
No, there haven't been rigid rules. There has been a well remembered courtesy to the thread starter and his or her intentions, in this case, a corner to talk. Re keeping threads to what it was about, that was the concept. Sorry your aren't interested in courtesy.
Yes, plenty of threads go whako fast, past usual jokes and diversions, but in days of yore here, there was interest in engagement started by the thread author.
Please start your own separate anti atheist thread.