I have been checking this website that sells a product (health related) and trying to find out if it is a scam site.

The site is something.blogspot.in (and not something.blogspot.com, which happens to be a different site altogether). So is it an Indian site?

It has a CBox chat box where the owner communicates with customers (or potential ones) for information.

The owner shows that his product has worked for people by providing links from a forum (created by him at network54.com) where people have posted positively. One doesn't have to be registered to post on there, but the IP address of the poster gets shown along with the post. According to the owner, IP address is basis of authenticity.

I found that many people had different IP addresses on their different posts. The owner has declared the nationalities of the people who posted. When I traced the IP addresses of them with this site, I found that the nationalities provided by the owner were wrong. Is it possible that when a person disconnects himself from an ISP, another person from another country gets his old IP address?