use Proxy in messenger is safe or not?

if we use free online proxy sever in yahoo messenger,is it safe? can they steal any information ?such as what?
How to use proxy in skype?
can proxy help to hide ip in messenger?
Pls help me…because i feel like someone is invade my privacy when i talk onlne!!!!
i really appreciate your answer….thank

There is considerable risk in using free proxies from unknown sources. Many of these free proxies are what are called hacker pots. They are there waiting for you to fall into their trap so they can steal your information and plant bots on your computer. Once a bot is planted the hacker has control of your machine and can steal credit cards, attack web sites and send out tons of spam all from your IP address.

Some of the free proxies are run by people out to make money. There is nothing wrong with that in principle. However the best case here is that you will get a proxy loaded with advertisements with no real speed to it. The amount of money the owner can make with advertising clicks is really only pennies. Many of these owners supplement their income by key logging everything you do and selling your personal information to advertising companies. Since you have no way to know what the owner is actually doing you need to assume the worst case is true.

Read some more about free proxy servers below:

http://www.personalvpn.org/danger_proxy_servers.htm

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