Anything can be hacked. I was trained by a Ugandan Indian guy while practicing for my CEH certification. Once you reach a certain level of hacking, you get to learn things out of scope, and no one will ever get to know your capability. Hackers can quickly assemble payloads geared towards attacking the CIA (Confidentiality, Integrity, and Availability) when they can't successfully penetrate and exploit. Tampering with availability alone can render the subject kaput.