Prevent Accidental Reboots when holding down the power button

I often end up accidentally rebooting my Nexus 6 while having it in my pocket, because the power buttons gets pushed for more than 10 seconds. Considering the long boot times, this can be very annoying. I can see why it is important to have a way to force-reboot your when it gets stuck, even though I haven't had this type of issue yet. Is there are way I can change the force-reboot behaviour? Perhaps increase the time in which power button must be pushed or change it to a combination of buttons (i.e. volume up + power button for 10 seconds) ...anythign that makes it less likely to be triggered by my pocket.