With regard to earlier posts if the seats are an MEL item the unservicability should be in the Technical Log, not the Cabin Defects (where no mandatory cabin items are snagged).
In addition comply with the restrictions in the MEL, which normally require the seat to be either unoccupied or locked in the non reclined position.
If you are a passenger who is concerned, I suggest that the easiest remedy is to email your national CAA/ FAA organisation with the date, flight no and seat, together with any observations that you might wish to make.