Fully agree there’s no way to stop them if they really want it and they have enough of an opportunity. It’s more about slowing them down I guess.Don't under estimate the street urchins ways and means of pilfering....
Original poster and others have had their spares stolen with this type of 'anti-theft' device fitted..!
It is merely a deterrent to a level 1 street urchin....
The undertray covers the thread but this can be easily broken away to give access but to fit anything to protect this it looks like I would have to remove part of the undertray first also.
I wonder whether it’s possible to fit some loose tubing to screw the bolt into.