To protect your settings on Quicklaunch and only let a selection of people change or enter your settings you can add a password.
( Settings Password Not Recommended For DEMO MODE)
How to add a password to your settings -
1. Enter settings - Click the Gear Icon (Shown Below) or Ctrl-Alt-S
2. Enable Password
3. Enter settings, and a screen asking for your password will show up - (AS SHOWN BELOW)