You couldn't make it up with Yahoo.

I allowed it back on all the sites bar the one it was basically doing a "Denial of Service Attack" on, and banned it in the Robots.txt

It completely ignored that, and brought the server down again last night

YAHOO

So I've banned it now via its IP on the article site. I know what it's done. I added software to list sitemaps for Google last week for better indexing, and Yahoo managed to find them and seems to want to index all 107,000 articles at once!!!