that is a tough one.
And it is tough enough for us mods to start deleting all the off topic posts, too.
If it is in a general board as long as it isn't verbally offensive or a person attack on someone, that is fine.
Now if it is in a C&R board and it is totally off topic, then we start moving and deleting.
And sometimes we let specific topics ride in the general boards for a while too, then they start getting moved to the specific topic boards.
this is a tough call, bud.