Most websites promising "hacker activation codes" for Skype are fronts for Malware Distribution .
In reality, searching for or downloading these "codes" often leads to severe security risks, including malware infection and identity theft. The Reality of "Activation Code" Scams Skype+hacker+activation+code
Historically, Skype has faced legitimate security issues that hackers exploited. These were fixed by Microsoft and did not involve "activation codes" for the public: Most websites promising "hacker activation codes" for Skype