The practice of indicating kcals as "Calories" always seemed to be an American thing to me. I don't know how widespread this is outside the US but there are plenty of countries that use "kcal" in nutritional tables and such. People will still colloquially confuse calories and kilocalories a lot but that's largely due to bad translations (similar to mistranslating short billions).

In Poland you write "100 kcal" but say "100 kalorii" unless it's in scientific context.

People everywhere mix those 2 regularly and nobody is confused. You don't say you go out for a run to burn some kilo calories and so on. Sometimes places like HN are needlessly pedantic

If someone explicitly writes "160 000" calories I'm going to assume they meant 160 kcal.