Banned for excessive searching

I can understand some of the other good reasons listed (flooding the chat room, private messages, repeating text, connecting/disconnecting quickly, too many clients on the same IP, etc. - how about signing up on multiple names repeatedly and avoiding the IP block when you use a proxy?) for being banned from the server for 30 minutes, but the excessive searching/repeating a search one seems a bit ridiculous. I like to search from the wish list for terms I don't have enabled. What's the limit of searches per minute so I can avoid wreaking havoc in the future? I fail to see how one person searching can cause server load. If the wish list searched quicker than every 2 minutes, I would have no need for the other searches.