I just run today into http://www.80legs.com/webcrawler.html on customer's webserver. It crawled by many threads and way too high rate for a slow PHP webshop hosted on an old P4 Xeon/few RAM server.
A tried filtering by robots.txt first:
User-agent: 008
Disallow: /

On the following 15 minutes there was no request to robots.txt at all. At this point I decided to create a more powerful filter at once. I put these lines to virtualhost:
<Directory /var/www/homedir>
 <Files*>
  SetEnvIfNoCase User-Agent "www\.80legs\.com" bad_bot
  Order Allow,Deny
  Allow from all
  Deny from env=bad_bot
 </Files>
</Directory>

Only one question left: why?

I will update here if I get some news from customer about his recent marketing actions. I am almost sure this plague was not for nothing.

http://toolbar.netcraft.com/site_report?url=http://www.zl.hu

Birkebeinen Senter, Bergen, Norway.

Some moss-creature. Blåmanen, Bergen, Norway.

Created by anonymous artist in Sjøgaten tunnel, Bergen, Norway.