On 20 Jan 2004, Elessar wrote

A really useful newsreader feature would be "ignore any item
crossposted to n or more newsgroups". n=3 or 4 would be about
right.

Xnews has precisely this feature -- http://Xnews.newsguy.com.

--
Cheers,
Harvey

For e-mail, change harvey to whhvs.