anyone care to bet everyone with a linkedin account who works at a tech company just got targetted attacks? Hi, my name is Joe Hacker, and I work at <domain name>! Since you got my linkedin account, why not try that password at admin.<domain name>?
Anyone who uses the same password for their linkedin and company account earned their punishment for intentionally violating their company's information security.
Protip: Whenever you are evaluating a system and there is an unacceptable failure mode and your answer is "let it fail, then blame the user", go back and find a different answer.