I was playing with the not-very-documented FocalTech FT5452 touch sensor on my Go6.
Code:
# ./fts
In use
FocalTech FT5452, version 08
3 points
I haven't found a (nice) way to kill it yet.
Edit: Well, I did find a way to kill it for the Poke3, Poke5, Go6.
It kills it dead. To restore, just close the cover, wait a second, open it.
You have to be rooted and you have to figure out a way to run a small executable.
ADB shell works but doesn't score high for accessibility.
If you want to try this for one of three devices above or another Android-y device, just shout.