What exactly is a “Hackintosh”? Since a Mac runs on Intel chips and BSD Kernel, besides being cheaper, what are it’s benefits over running BSD on a Thinkpad? Also, isn’t it true that Apple is very religious about aggressively prosecuting anyone who tries to put MacOS on non-Apple hardware?

Beware of DMCA. You will be surprised to know how easily Apple can get you arrested! I know some big and famous companies who sent to jail some ex-engineers who emailed some source code they were working with to their personal accounts (from company machines).