It has nothing to do with the poster. It's GardenBanter ("A web gateway
to the finest gardening newsgroups") - this is from one of their FAQs:
What happens when I post on this forum?
This forum is a mirror of a collection of Usenet newsgroups. Usenet is
made up of thousands of news servers all over the world. When you post
your message, it is distributed to these news servers where people will
connect to their own local news server via a News reader and be able to
read your message. Once your message is posted, even if it is deleted
from this forum, copies of your message will still exist on other news
servers around the world permanently. This distributed posting system is
Usenet's main strength however it should be noted that once the post is
made it is impossible to ever completely delete it.
It also picks up new posts in Usenet groups and adds these to its forum
(these appear as "external usenet poster").under the poster's name,
whereas a new post directly in GardenBanter has "Registered user" under
the poster's name. This information does not appear in the Usenet group
in which the post is repeated).
The problem is the random nature of the group which GardenBanter selects
on Usenet to put postings made to its forum. It started with
uk.rec.gardening, then added rec.gardens, and now seems to have added
aus.gardens. Crazy - no rhyme or reason.
There are also other similar forums such as DIYBanter. There are
probably many others.
--
Jeff