Jim, this locking has been going on for years, there's spates of it, we complain (oops, express our considered views on the matter) and it stops for a bit. The problem as I understand it is the "Alert Moderators" button sends info to Admin, not Moderators.
Posts have been locked/deleted for less than this. It just shows how risky it is to give people power.
Having said that, the owners of the site can set any rules they like, and adjust them at will to ensure plonks like us keep posting so people keep reading and occasionally glancing at the adverts.