In all my years on the web this is the first time a third party ran this on my site:
UA: Mozilla/5.0 (compatible; XML Sitemaps Generator; www.xml-sitemaps.com) Gecko XML-Sitemaps/1.0
IP 81.19.188.xxx
Robots.txt: NO
Took about about a third of my site. Unless there is a compelling reason why I shouldn't this little puppy has just entered my deny list.
