Hi Cosmick,
Thanks for posting - we can all learn from your unfortunate experience. As others have said, the main thing is that you and your pax are OK, although it is obviously sad about the plane.
We have toe brakes in our Gazelle, and I find them very useful - but then I have small feet, so I do not usually have a problem with inadvertently hitting the brakes! The main problem we have is no parking brake, so sloping ground or windy conditions can be interesting until a quick exit can be made from the cockpit to chock the wheels!
All the best with getting back in the saddle, and I hope Mark's plane can be quickly (and not too expensively) fixed.
Cheers
Neil