How to hide the Recycle Bin

Open Regedit, find this key :

HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Explorer/Desktop/NameSpace

Delete the subkey {645FF040-5081-101B-9F08-00AA002F954E}, then restart the computer to see the result.
To have back your Recycle Bin, just rebuild the subkey {645FF040-5081-101B-9F08-00AA002F954E}.