The UU Leaders email chat has been dealing with the relationship and meaning of "Freedom of the Pulpit" and how that extends to things like rental weddings. So I started thinking about the many issues this raises.
Freedom of the pulpit, in this minister's belief, is the freedom from advance censorship. It is extended to a minister because the minister and congregation have covenanted together; the minister to speak the truth in love and to mind the best interests of the church and the traditions of our free faith, and the congregation has agreed to hear that truth, love, and responsibility with an open mind. (Freedom of the Pulpit might not be extended to those who are not in covenant with the congregation. We don't extend it here in Albuquerque and regularly ask to review pulpit editorials and talks by guests and members in advance. We've actually never had to go back and ask people to make changes in content, but often ask them to shorten, tighten up, or otherwise do a better job with their writing. We came to this policy after some difficult experiences.)
A minister who, let's just speculate, got obsessed with polyamory and began to preach about it out of proportion to its importance to the members, who used the pulpit to scold those who disagreed, caused damage to the church's reputation in the community, and who did not speak responsibly about the pros and cons of openly accepting and welcoming this particular life style choice would probably be judged out of bounds of the covenant and could be asked to make changes in their preaching subject, manner, and priorities. If the covenant stayed broken for long, the congregation would probably dismiss the minister by it's democratic procedures.
It's not really true therefore, to say that "freedom of the pulpit means that the minister can say anything s/he wants to."