Rob,
Freecycling is not a thread.
Therefore it is my job as moderator to remove items from this section along with 'items for sale' and 'items wanted'.
This happens if and when I am informed by a member,when things have been sold, found etc.
Or, otherwise after about 3 months of listing.

If there is a thread that contains filth, swearing or such like
I usually ask Nigel, who then decides whether we should delete it or not.