Original: In addition, there is broad agreement that you may not include in your user space material that is likely to bring the project into disrepute, or which is likely to give widespread offense (e.g. pro-pedophilia advocacy)   whether serious or trolling, it's not what user pages are for.
Simplified: Inappropriate content There is broad agreement that you may not include in your user space material that is likely to bring the project into disrepute, or which is likely to give widespread offence.