FRC Robots should never be connected to an untrusted network -- EVER. Consider the following:
- All robots ship with an active FTP server with username/password FRC:FRC, which allows you to reset the software to anything you want
- You can completely reimage a rebot without authentication
- For robots running windriver, a debugger can connect without authentication -- I'm sure you can load labview code without authentication too
- If you have NetConsole active, then you can run arbitrary commands on the robot using a shell. Once again, no authentication.
- I'm sure there are many other things
So worrying about dashboard communications is the least of your worries.