Watching a colleague request clickfinger method and him clicking the first time, the fingers of his right hand were in almost 45 degree angle, further apart than the current clickfinger distance rectangle allows. We should increase the size of that rectangle, especially on larger touchpads. Potential solution to accidental thumb presses is to have an exclusion zone at the bottom of the touchpad, i.e. a finger in that zone doesn't count towards clickfinger.
http://lists.freedesktop.org/archives/wayland-devel/2015-July/023188.html
commit 7d314738fb7cb351d08b9860158bfb41975fb6c0 Author: Peter Hutterer <peter.hutterer@who-t.net> Date: Fri Jul 3 10:30:06 2015 +1000 touchpad: be smarter about clickfinger thumb detection
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