said by chachazz:.......No contact has to be made with the user in order to get the information. ... that's a "feature" ?
But wouldn't the IP address and port eventually be necessary if you'd ever want to make a contact with a person?
In October 2011, they published results showing how to surreptitiously track the city-level location of 10,000 Skype users for two weeks. Given how popular Skype is in the industry, the researchers described how the flaw could be used for corporate espionage: a firm could track the movements of rival employees as they travel to determine where theyre doing business and with whom.
If someone is worried about tracking, then use something else. People can be tracked if they carry an ON cell phone, for example, and most people don't seem to be too upset about that.