[exim] Laying out a spamtrap

Hello,

This is slightly OT, but only slightly I believe - I connected
statistical filter to Exim, but am lacking spam stream to feed it.

I have published spamtrap addr on some webpages and posted the web and
e-mail addresses to test Usenet newsgroups, over a month has passed and
still no spam is catched there whatsoever, while regular addresses are
filled with spam.

So hereby I post a practical question: how exactly an admin can
effectively propagate spamtrap addresses to spammers?

--
Marcin Król