@PT247 largely irrelevant, it's a blanket ban brought about by private sales of actual firearms in the US. FB decided they would just ban the sales by "unauthorised dealers" of anything that vaguely looks like a gun. FB members have reacted with their usual self control and started falling on their Cold Steel swords with abandon.
We have just set our sales group for the local game site to secret, as the only way of them locating sales is people reporting them manually, so by going secret we have even greater control over people entering the group.