I had an experience with this recently. I was boarding my flight to BKK (QF23) and was actually the first through the door. One of the senior FAs saw my name on the boarding pass, moved me to the side and said that they saw I had had a problem on a "recent flight" (his words) with a vegetarian meal and that I had been given the Captain's meal due to mine not being loaded. (BTW, I hadn't demanded anything, but the CSM had brought it down and told me after the fact). He mentioned this because he saw I had obviously requested a vege meal on that flight but said that my booking reference for the current QF23 wasn't showing a vege meal request. He said that although I hadn't requested it on that flight he would make sure that I would be looked after.
I told him it wasn't a problem and that I was happy just to pick around what was served. Later in the flight the CSM came to do the greeting and also mentioned this. I had initially been confused as to which "recent flight" it had been but he then clarified that it was on my JASA to Townsville in November last year (there had been plenty of flights since then). I was worried that I had been labeled as a problem passenger but he assured me it was all good. When the meal service came around again the cabin crew said that they could put something together for me again for which I thanked them, but told them not worry about it as I had had a good breakfast in the FLounge.
The CSM and cabin crew were great. For your reference Red Roo it was QF23 on 28/04/2014.