Perhaps you should actually read the First Amendment. Freedom of speech applies to government restricting your freedom of expression, not a moderator or board admin deleting your post.

Sorry if that upsets you. A lot of people are under the false impression they have the right to say or write anything they want. That's not reality. Moderators can delete this post and I can complain or write to admins about it, but they haven't violated my rights because the Constitutional protection never applied to them.

It's similar to our Constitutional right to privacy. It refers to privacy from the government. If I want to investigate you and obtain all the info on you I want (which is easy today on the internet), I haven't violated your right to privacy because the law doesn't prevent me from doing so. Again, people are misinformed on this protection, as it only applies to government, not to individuals.