Actually you're right Alan, they were banned in the 18th century, but began to be allowed once again when the British began forming regiments of Highlanders. The clans never went into battle without the pipes, and the pipers have stirred thier warriors into battle into modern times. There were over a thousand pipers killed in WWI, and even today, when a fallen warrior is put to rest, the pipes are there to send him home.
I will agree with you though on the Maoris and other South Seas groups. I recall younger years in California where certain conflicts arose, with most odds being reasonably level...except when Samoans showed up! Then it was time to quick exit!
All best regards,
Jim