On a very recent JNB-NBO leg, KQ cabin crew tactfully dealt with this situation:
As KQ761 luckily gets a 787, many seats are often vacant so a few pax tried to sneak in to the very upfront Y seats before, after the end of boarding, and during cruising.
I'm trully impressed that the KQ crew came twice with the PIL to ask the name + checking the BP to verify that Economy Comfort was effectively granted to those already seated in before we took off and closing the curtains..
A few of them were obviously upset to see an almost empty plane along with these attractive seats upfront....and are still certainly arguing at this time about this issue to KQ staff in NBO, LHR, JFK....
During approach, same story, despite we were actually ahead of schedule.... but same answer from the crew
When
Offvoice posted his/her first trip, only overhead compartments got the mention of "reserved to Economy Comfort", now the 3 first rows show a clearly dedicated and visible headrest in red, like KLM does (in Orange?) .