A person who uses freethought to evaluate the likelihood that a claim is true. A freethinker depends on the quality of the evidence to reach a conclusion and is not intimidated or influenced by religious dogma or authority. A freethinker is not constrained by tradition and is unafraid to challenge unsubstantiated and unverifiable testimony, regardless of its emotional appeal. Atheism is the absence of a belief in god or gods.
Most rationalists are committed freethinkers as well.
That is a serious inquiry and not just an attempt to beg the question. Re-read that definition again and honestly try to make sense of it. It's only when unverifiable religious or supernatural notions encroach on our public policy that a freethinker will take a stand and speak out. If anyone can show that freethought leads to someone loving their children less or decreases respect for human life, then, and only then, is the question even relevant. If, by that, you mean praying in public, then there's likely no issue.