How can I disable command-shift-option-Q?

I'm in charge of 30+ iMacs where I work and the users are occasionally being logged off when trying to do their work. They apparently are hitting the command-shift-option-Q keys which are automatically logging them off without warning.

These are real-time applications that need to run 24-7 so this messes up their work.

Is there any way, from the command line, that I can disable these key combinations?

Thanks for any help.

-Jon