Off in the weeds

Dan Luke wrote:
Oh, well; another lesson learned. "Controls free and correct?" Maybe at
the moment you check, but watch out for anything that could
interfere with them while you're not looking.

This is the one thing that has me nervous as I prepare to transition to a
aircraft with sticks instead of a yoke. I have a concern that even though I
plan to brief each passenger to "stay clear of that stick between their
legs" especially during take off and landing I still worry that if they get
nervous they might tighten there legs together or do something else to block
the freedom of the controls.

The only other aircraft I've flown with passengers and a stick is the R22
and it design tends to get it out of the passengers way.

What do those of you with stick controlled aircraft do to deal with this
concern.