Hi all,

RECENTLY I was doing some self-learning about Proxy.
I downloaded a few Proxy software to HELP me get some basic conception on how Proxy works,
and meanwhile I visited this web site:
http://whatismyipaddress.com/
and I was detected to be using Proxy tool.

I got some questions in mind:
1. All the Proxy software I have tried on claimed that they can hide the USER's IP from being detected or found, but how come whatismyipaddress.com knew I was using Proxy tool?
2. Say if I was using Proxy visit a P2P community and downloading some copyrighted materials there,   
 can the cops still be able to find my real IP even if they do not go to raid the Proxy server?

Thank for your reading.

KittyHello, kwfine.
You should understand that here on computer help forum we cannot help you with cops and robbers.
This forum is widely read and any information we put here would be available to a large number of people. Helping anyone to a fully prosecution for a crime would make the forum members a party to the crime. We can't have that.
One of the reasons for using a proxy is when some restraint has been put on some users because they do not have permission to engage in certain activities. There can be a legitimate reason for someone to use a proxy server to get around this. I will cite one example. A United States citizen with proper credentials may travel abroad to a country that is not in a favored position with United States. Internet access into and out of that country may be limited. So the citizen who is fully qualified to access some confidential or secret material may use a proxy server along with appropriate credentials to get access to material that is not allowed to go into that particular country. However, that is a rather exceptional situation.
In your case, it appears that you want to copy material that is covered by the copyright law. If you do not have a legitimate reason for doing thaat, then you should not be doing that.

But if you just want to watch old TV SHOWS, that is not a problem. They are available on the web with reasonable terms of service usage rules. Not hot box office movies. It will be awhile before you can see 3-D AVATAR on your PC.
Thank you for the prompt help, Geek.To answer your question though, no, you can never be completely hidden.