Information
One of the simplest things you can do is to configure a warning banner, the electronic equivalent of a 'No Trespassing' sign. Although it doesn't technically protect your device or network, having a warning banner with very specific acceptable use instructions could help your organization by serving as a reminder of acceptable use and as a legal disclaimer.
Solution
Configure the login banner with your organizations policy.
user@host# edit system login
user@host# set message <LOGIN_BANNER>