What Happened to Freedom of Speech?

The Constitution guarantees freedom of speech, but GWB is doing his best to limit that right. Cindy Sheehan is camped outside his ranch in protest against the Iraqi War, in which her son was killed. She is hoping for another opportunity to ask "why?" As the following quote shows, she is obviously not allowed to express herself, and is being told to go away, Texas style:
"Late last night, a pick-up truck dragging chains ran over the rows of white crosses on the side of the road near Cindy Sheehan's vigil. Each cross commemorated a dead soldier; this morning, many of them were broken or gone."
To me, it sounds like something the KKK would do, a pickup, with chains.... The story went on to add that "no one was hurt." That is not completely true -- our right to self expression was seriously injured.