Related link: http://blogs.macmerc.com/rick/archives/2004/11/16/ichat_info_thei.php
On the internet, no one knows you are a dog, unless you are using iChat. Rendezvous users on the same network may be able to snarf your personal information without you knowing it.
In the iChat Preferences under “Privacy”, check the box “Block Rendezvous users from seeing my email and AIM addresses”. This doesn’t matter much at home because my wife and cats already know who I am, but at conferences I usually find a long list of Rendezvous users.
Chat privacy problem
So what's the problem? Checking an option in iChat Preferences?
Problem-Not
Just makes for a more sensationalized headline.
Chat privacy problem
The problem is that iChat exposes information I don't intend for othr people to have unless I check that box. By default, it's not checked.
I wasn't aware of that, so iChat would allow it without me knowing anything about it.
Chat privacy problem
you should file a bug report with apple explaining this problem: