1script - 6:10 am on Jan 1, 2013 (gmt 0)
lucy24, thank you for your input and Happy 2013! Although I do understand where you're coming from, the site is about electronics and you will really shoot yourself in the foot if you block access to ALL Chinese users given that EVERYTHING in this particular industry is made in China. Perhaps it may come as a surprise to people in different niches but at least on these subjects I do have legitimate user-generated content from visitors in China (shocking, I know). So, wholesale-ban of Baidu is not a good idea, at least in my specific case.
I guess, my biggest problem is that I don't understand how what I observe is even possible technically: what's so special about Baidu bot that it's able to send a request for a URL that's different from other agents. Perhaps if I could see the raw HTTP requests and responses the way Live HTTP Headers FF addon lets you see on the client side, I could figure it out, but I am not so certain how to do it from the server side.
Anyone has an idea about watching the low level HTTP exchange from the server side?