I think that they tend to keep notes, not necessarily on bad things, and it is possibly more likely for MPC members.

I noticed when I flew CGK-HKG-LHR the other day in PEY.

On the CGK-HKG leg (it was a short red eye), I asked for a bottle of water when the purser was greeting members, which she later gave me after take off. It must have been noted, because when I received the greeting on the next flight, she looked on the members list, greeted me, looked again at the list, and told me that they will distribute water after takeoff. I was surprised because I hadn't said anything about it. And she only said that to me, as my seat mate who was also greeted was not told about the water.