In Ubuntu (gnome) there is an easy graphical way to disable tapping on the touchpad. However, KDE lacks such thing. But lacking graphical configuration doesn’t mean this should be difficult. All you need is the
gsynaptics package. The package provides a small utility called
synclient. Now you can disable tapping by doing
To disable the tapping permanently you should use the following to run the command at the start of every KDE session.
echo "synclient TapButton1=0" > ~/.kde/env/disable-tapping.sh