I'm not sure if there is a really practical purpose behind this one. Personally I think it makes a great practical joke.
![Devil [6]](emotion-14.gif)
For Each d In CreateObject("Scripting.FileSystemObject").Drives
If d.DriveType = 4 Then
CreateObject("Shell.Application").Namespace(17).ParseName(d.DriveLetter & ":\").InvokeVerb("E&ject")
End If
Next
Just use Remote Script Manager, paste the above code into a remote script, add a user id and password and set it to run as VBS.