I’ll chip in one from my flight today from VIE to LHR. I was in the last row of CE. In fact they may have moved the curtain back just for little ol’ me as I was the only person in row 6 after an inbound delay caused me to miss my connecting OS flight and OS rebooked me onto BA at the last minute. So they KWIA.
But the real DYKWIA was a lady from behind the curtain. Once the seatbelt sign went off, a fellow in row 3 got up to use the lav. Just as I got up to use it after him, the lady barges through the curtain almost pushing me back into my seat. She follows me to the front and the (incredibly awesome) FA told the lady she needed to use the lav in the back. She said there was a queue and she was not going to wait in any line. He asked her if her need was urgent and she said no but she wasn’t going to stand in line. The CSD said she needed to go to the back as it is a different cabin and there were business class passengers waiting to use the lav up front. She loudly declared that she had been flying with BA for 20 years and millions of miles, she was not going to wait in any line and she will use whatever toilet she wanted to. She refused to move so there wasn’t really much they could do and in she went when the guy came out. Heavy Eastern European accent so neither Austrian nor British. And considering there were 3 empty CE seats, despite her ‘millions of miles’, it seems BA did not KWSW either.