Free speech is totally real, expressing your opinion is allowed and announcing lies and heresy is also allowed. Just because you have freedom of speech doesn't mean there are no consequences. Hell, I could use a really amazing analogy here and say "If I saw a free burrito and ate it, I wouldn't get a huge case of the bloody-turds because it's FREE! " or if you don't like that one: "I have freedom of movement so I could move into that active volcano over there and NOTHING BAD WILL HAPPEN! "
You can say and do what you want, just don't start bricking yourself when people say and do what they want as well.