I've just banned an anonymous proxy after it queried my site continually for twelve hours. Now, there's nothing unusual about that. However, the pages are very similar to those I uploaded to MSN Adcenter yesterday morning.

I have had traffic from the IP before, although in smaller volumes but only since I started to experiment with the automatic uploading of ads to MSN Adcenter. The site in question is a motorsport news/forum site.

I highly doubt MSN would use an anonymous proxy to check pages, but seeing as I have now banned the IP address, I thought i'd bounce my thinking off more experienced users. What is it likely to be?