Well, for starter, in the code of linux, its open, so linux would kinda be near impossible to completely ban, unless you got other information like the type of programs installed and stuff... or how the system is set up. would b REALLY hard.
and as drawmack mentioned, yes, that would be possible i think, but who would go through all that trouble just to get unbanned? would be a hacker with a lot of free time lol.
it also would not rely on 1 thing, it would have a number of things it could compare, for instance, MD5(version.OS.log-in name); and another: md5(serial); and another md5(version.Desktop Theme.Background Color.KERNAL Process number.Computer Vendor); near enuf, they would have to change everything on their computer to actually change it...
OR i could just go and do MD5(Physical Computer Serial); which would near enuf stop them from doing anything unless they got a new computer or whatever (that would work on linux, maybe MAC, dont know anything about MAC)
But ya, if anyone can find out any info about getting the Physical Computer Vendor/Serial and/or Serials of any other physical Hardware, then the security would b near inpenatrable.
Thanks for quick response and thoughtful comments 🙂