being seen as too dangerous and suceptable to fire and crashing
One of the pioneers of aeroplane development killed himself after seeing them used for death and destruction in the First World War . . . as usual his name escapes me; I'm pretty sure he was of Brazilian descent, but had done his work in France...
You could get some sort of idealistic agreement between nations not to use aeroplanes for warfare, and then have them miraculously stick to it - of course, as we have seen with agreements from no use of gas before WW1 to the modern Geneva Convention abuses, its one thing to get the powers to agree something and entirely another to get them to abide by it...
Best Regards
Grey Wolf
@GW: That would be Alberto Santos Dumont. RIP.
WI planes were never used in war, but only in peacetime persuits?
Thus, by the time that warplanes become feasible, radar directed ant-aircraft guns with proximity fuses exist, shortly followed by anti-aircraft missiles.