Maybe a bit controversial, but why don't we allow the president to fly a Rustler? It's an airplane that can be easily shot down by another Rustler, so there's no hidden advantage for the president.
Yes, skilled flyers will be hard to kill, but isn't that the same for skilled stunters? We allow presidents to use NRG bikes, why don't we allow them to use a Rustler? There are more skilled stunters than skilled flyers in PTP, yet we allow NRG bikes and don't allow Rustlers...Seems a bit odd to me.