"M$ NT's blatent ripoff of BSD's ipv4 stack."

Perhaps you need to refresh your memory of the permissive terms of the BSD license? MS just did what anyone else was both allowed and encouraged to do with the BSD source code.

(Also, a quick bit of googling shows they only used it for the NT3.5 stack, then wrote their own implementation for NT4. They still use some of the BSD utilities - finger, ftp, nslookup, rcp, rsh - but the stack is their own)

There's plenty to knock MS for, but this one's a red herring.