Live Chat Pop-ups

Have you ever gone to a website and all of sudden had a live chat box pop up? I was visiting a site and was greeted with an internal pop up that notified me that I was online with a live person representing the company. Is this a good marketing strategy? I thought about it for a moment and realized that it is probably not a very effective measure. If anything, it will deter visitors. Most people enjoy the anonymity of the internet, and when a live person messages you in consequence of visiting their site, it’s hard not to get an eerie feeling that you are “being watched.”