Hello - somewhat of an unusual question, but do any of you bring your own food on board the aircraft (especially for CW and F) instead of having the lunch (or dinner) offered?

I brought a Pret sandwich + one of their banana smoothies on board my flight yesterday and got a bit of a weird look + sarcastic comments from one of the cabin crew. I was also ignored for the drinks service and tapas towards the end of the flight (I could overhear the guy say to his colleague that there was no need to come to me as I had brought my own food). No big deal of course, but just thought whether mine was an isolated experience or have others experienced this. I would have thought at the very least that I should have been offered, even if I had declined.