While looking for tickets to a show. I hit up Ticketmaster, and visited 3 pages in a row before I got this error:
We limit the rate of web page requests that can be made by individual users in any given time period. Your web page requests have exceeded these limits and your access has been temporarily disabled. We impose these limits to protect the web site from automated programs, as part of our efforts to promote fair access to tickets. Please allow several minutes and then try again.
Apparently cable + IE6 is too fast for Ticketmaster to handle. And don't even get me started on that "fair access" part...