Despite unsigned applets being rather dangerous, they are missing four important and rather safe rights:
1) The right to open a trusted file save dialog that a user can use to save a file to a location of their choosing.
2) The right to open a trusted file open dialog, as above.
3) The right to read from the clipboard immediately after the user has pressed Ctrl-V.
4) The right to write to the clipboard immediately after the user presses Ctrl-C or Ctrl-X.