[USB] Keyboard, mouse and ergonomy

Hi,

I was thinking about adding a sysctl to ukbd and ums that shows how many 
keypresses have been done and how many pixels you have moved the mouse during 
a day. These number will mostly be useful for making ergonomic arguments that 
a certain way of working is better than another one.

Anyone have any comments or input on this? Are there any security concerns 
about this?

--HPS