bvgs,
if you put the switch anywhere else but the controls, you need to take at least one hand off the controls to switch ON/OFF.
Although you need to loosen up on your grip, you cannot let go of the controls while switching.
Sure R might have put this on the collective, but you really just have to get better organized in the cockpit! Don't cram your lap space with charts and other parafernalia - Use the left seat or lap of the passenger there. Don't mount your GPS on the T-bar etc.
Besides it is a rather harmless thing to accidentally switch the hydr. off. If you don't realize they're off - you don't need them!
3top