I'm fine with people putting ice in Macallan; it's when they want to add ice to a truly great single malt like Springbank or (good heavens) Port Ellen that I want to cringe.

Some years back I went to a whisky tasting event hosted by Macallan, and their "brand ambassador" was quite nonchalantly splashing Macallans from 10-18 years old over big spherical ice balls that mostly filled the glass they were placed in.