You don't need the rules to know that sharing information from internal sites might be prohibited. You need them to be able to prove that sharing information li

You don't need the rules to know that sharing information from internal sites might be prohibited. You need them to be able to prove that sharing information like this would get somebody fired. The other possibility (which the NLRB seems to believe) is that Tesla normally would have been OK with this sort of sharing or given only a warning, but this time was specifically looking for an excuse to fire the employee.