Many levels of security can be managed for you. Tailor it to your needs and let us know what your comfort level is. And of course we want to do it in as transparent a way as possible.
If you can't get to something chances are people can't hurt themselves and it keeps the honest honest. The best security. Monitoring activity can help also.
A combination of IDS/IPS, Web content filtering, and firewalls, email filters, Network partitioning, etc will go a long way towards avoiding security events both known and unknown.