The most famous incident like this is "neverseconds".[1] This is the blog of a primary school girl in Scotland who, each day, took a picture of her school lunch and reviewed it. The school authorities threatened her and insisted she stop. That backfired on them, badly. Coverage on TechDirt. Coverage on the BBC. Worldwide press coverage. 10 million page views of blog. Complaints in Parliament. School authorities disciplined by national education minister. Public apology by town council. Girl wins several awards for fighting censorship.
Her blog is still active, three years later. She encourages other kids to send in pictures of their school lunches, and it's a great site for seeing what kids have for lunch around the world.