So now it's fun to get on a system owned by somebody else and intentionally circumvent the security set up to protect and ease the experience of the next person who has to sit down later and use that same system???... Very interesting... And here I thought schools were for learning.

1. Rules are rules and like it or not, schools have a unique responsibility to ensure that inappropriate content will not be accessed and that their systems are used for educational (and lawful) purposes.

2. Most Admins worth their salt will have set up those systems so that even if some turd-bird was able to change the default setings, they will not be saved and as soon as the system is logged off or restarted, the default settings will be loaded anyway - so what's the point?

3. A decent Admin will be able to track who made what changes and when, and then be able to provide such documentation to the "powers that be" for suspension or expulsion proceedings depending on the severity of the infraction.

Take everybody's advice and use the school system for the reason for which it is provided and personalize your own system at home.