The thruxton foot pegs are also prone to breaking but it is the peg itself that breaks very easily at the pivot pin when the bike is dropped so this is something to look at if you ever drop a thruxton. The right hand side one is prone to breakage due to the position of the break master cylinder guard. As the peg folds in during the event of a fall, it contacts the guard and is actually pushed or forced on another angle to its actual design therefore putting more weight on the pivot pin area which is a weak area because of the hole and it cracks. They are also very expensive to replace (Australian $100 each without rubber). I replaced mine with oberon's.
The Bonnies I think just need to made sure that they are kept tight at the mounting bolt nut. I checked mine and they are super tight (FT Specs) so I will be including this check on my weekly check list from now on. Visual all over check, Tyre condition and pressure, chain tension and lube, lights, Brakes opp and condition, Suspension travel, headset, wheels and swing arm bearing movement, leaks and squeaks, oil level and now foot peg bolt tension..... Anything I might of missed??