How does Freedom of speech Limit the Federal Government?

The Freedom of speech can limit the Federal Government by, meaning if there was a student who said something in the internet that may or may not offend a site/person then you'll get consequences from parents. Because of that, that means their is an extent/ limit of what you say that can hurt the government/law. However also,  slander is illegal because once you have made threats against someones life or either government from what you say, the government may go keep an eye on you. So YEAH be careful what you say to the government and people because it may affect your life. Also, these are a few facts about "Freedom of speech" and how it was made!