vandalism and school gardens

I have been hearing an increasing number of people worried about vandalism in school gardens. I found an interesting website that can maybe address some of those worries in dealing with potential vandalism in a school yard. http://www.popcenter.org/problems/graffiti/summary/

The big message I got from reading this website is that there are several things a school can do to try and combat graffiti and vandalism. If it is an ongoing issue, proper lighting in the areas that are being tagged can help. This would include security lighting or motion sensor lighting that comes on when it senses movement. The other major step is surveillance. Bringing community together to look at neighbourhood watch schemes etc may help in protecting areas. One website on school gardening mentioned including a community garden on the school ground site, including neighbours so that community members keep and eye out for the school garden and property. One other potential idea might be signs that are posted telling potential vandals that the garden is work of the students at the school and any vandalism will affect children.

 Does anyone have any ideas in which to combat this?