And a PA problem is definitely something to report as it is a safety issue, so they should be happy passengers report. I have always been uncertain exactly how to report problems on the aircraft as the FA's always seem so busy. Maybe a little card that can be left on the seat? Aside from that - I have been thinking in particular about the serving of ice cream sundays and how much work it must be! While I like them, I think other desserts could have been chosen that didn't take so much effort and perhaps cost?