Veritable Irritant No More
If you have a laptop running Debian Linux or another Linux flavour, touchpad tapping is enabled by default.
This causes the cursor to hop around if your typing or if your hand touches / brushes the touchpad.
Its annoying and time consuming, to go back and correct typing errors caused this way.
If you run GNOME or KDE desktops its easily fixed. If you run XFCE4 the method is not so obvious. There are no settings to disable this activity.
Disable the mouse touchpad on the command line with the following:
This causes syndaemon to delay response before activating again after a key press.