I am looking for advice on a potential letter of complaint. (I'm not looking for compensation of any sort, just hoping to make sure that something out of my control doesn't come back to haunt me). I was flying with my partner on a 767 internationally yesterday (I'm EXP and she's Plat). We were in 21A/B and the flight was fully sold (including row 17). About an hour before landing, my partner got up to use the toilet and when she came back, the flight attendant was sitting in the jumpseat blocking the aisle (the fasten seat belt sign was not on). The flight attendant told her to go around, so she went to the other aisle, realised that people in row 20 had stuff on the floor, so went back and asked the FA politely if she meant that she should go all the way to the back of the plane, to which the FA huffed and got up, letting her pass. About two minutes later, the FA stormed back to us in a huff and asked for her name. I asked for hers and pointed out that she had our names on the manifest. She said she needed them to 'report Exit issues' and walked off. Rather than asking to speak with the purser/CSD, we decided to let it go, and never saw her again, including deboarding with no issue. Assuming that's where it ends, I don't see a need to do anything; my guess is that she was unhappy because row 17 was taken by passengers and towards the end of the flight she took it out on my partner. But I'm wondering if it's worth filing something officially in terms of having it on the record in case she tries to annotate either of our accounts. Thanks.