oDesk Team for contractors has some really nice features:
- Keystroke logging
- Watching the user's screen
- Viewing the user's webcam
This simple hack notifies user before screenshot is taken. Yup. Get paid for watching porn.
// libx11/src/GetIFocus.c
int
XGetInputFocus(
register Display *dpy,
Window *focus,
int *revert_to)
{
// alert + delay
system("mplayer ~/alert.mp3");
xGetInputFocusReply rep;
register xReq *req;
...
}$ LD_PRELOAD=/freshly/compiled/libX11.so odeskteam-qt4