I wasn't making an argument so much as stating that making only truthful statements does not indemnify one from being the target of legal action by someone that publicly states they will only go after 'false accusers.'

That's true, but not particularly meaningful, since any statement from any person or company could be a lie regardless of how specific it is.

The company's claim that they will pursue legal action against false accusations should not discourage people from making true accusations, because the statement provides absolutely no information about what the company intends to do with true accusations. An analogy would be the statement "we will pursue legal action against anyone who trespasses on company property." That shouldn't discourage employees from going into their offices.