Restrictions on internet access in schools. Is this fair?

During my dance lecture this pass Tuesday I became very interested in blogging about education and social networks for children in schools. I contacted a good friend of mine who works in the San Fernando Valley as a teacher’s assistant for a middle school to find out if the school continues to restrict children on internet access. She explained that not only do children have a restriction but the faculty staff does as well. There is a code that can be broken and many of the children have been able to hack into the restricted websites. The schools faculty has to be constantly changing the codes to prevent all of the mischief.

I was curious to know the main reason for all of the restrictions and was told that many children go online to search a specific topic and come across inappropriate sites that are given by a search engine such as YouTube. A child may be interested in looking up a video on YouTube and is given 10 to 15 possible videos were 7 of the videos may have inappropriate scenes. We all know what these scenes may be!
Are schools wrong for wanting to create a safe and educational environment for children? Is the limitation on internet access in schools a productive or disruptive issue for children?