Freedom of speech does imply that people will say unpopular things. And Westboro Babtist Church does fall under this protection. Regarding extrajudicial consequences of e.g. whistleblowing in the private sector, I think that this area needs explicit protections since the consequences of pissing someone off are so severe. (From what I gather, whistleblowing against a US employer is more or less career suicide). It goes without saying that this is a democratic problem.

In fact, the protection of the freedom of speech is another prominent example that if you just leave the market forces to sort things out, you will eventually end up with a situation that is in opposition to the ideal of a functioning democratic society.