In article ,
Anne Burgess writes:

Its weird, some of the subject lines start [WR], which suggests to me that
it maybe corrupting some incoming legitimate postings.

Suggests to me that it is someone who is familiar with the group rather than
a random attack.

It was always likely to be someone with a grudge against the group, I
think.
--
John Hall "He crams with cans of poisoned meat
The subjects of the King,
And when they die by thousands G.K.Chesterton:
Why, he laughs like anything." from "Song Against Grocers"