The most important practice I have discovered for supporting good computer ethics and avoiding computer abuse is maintaining a cooperative and fairly open social environment, with administrators and managers in good communication with users and restrictions minimized and downplayed. I have learned this lesson at both industrial and academic sites. This is actually no different from avoiding abuse in other social environments. On systems where computer management is heavy handed or isolated, some users become alienated and try to break system security. In general, the more security is touted, and the more access restrictions are tightened, the harder some users will try to break them.
Many computer users are very interested in the systems they use.
If most system information is gratuitously off-limits, they will not see any reason not to try to get at it. They quickly get used to breaking security. On more enlightened systems, access restrictions are minimized. Where restrictions must be applied, the users are notified, the situation explained, and their cooperation is requested. It is never implied that the security mechanisms are unbreakable.