I'd go as far as saying that the term "free software" is a complete an utter fail. In my mind "free speech" is speech that is entirely unrestricted. Almost all FOSS licenses come with "restrictions", such as you must leave the copyright notice in place, you must add the "PROVIDED AS IS" spiel somewhere the end user can read it, you must release your derivative work's source code under the same license etc., so it is by definition no longer "free".

WTFPL is probably the only real "free" license.