Comment 2 for bug 926401

The correct and less hackish way to do this is documented:
https://help.ubuntu.com/community/Lubuntu/Mouse
Note these settings will persist regardless of how you update your system since they are in home. You cannot ensure the same thing with changes in non-home directories.
I use this myself to disable tap to click.
Given this, I'd call this bug invalid, but I'll leave it to ya'll to confirm.