Last night flew on a redeye flight in a 737-800. The flight was fairly full with many pax, including myself, sitting three abreast. However I noticed a pax sleeping while occupying three seats. Asked a FA if this was acceptable seeing how other pax were cramped. She responded that she thought this was inconsiderate on the part of the pax, but was not prepared to awaken the pax so some else could share the three seats.

What are your thoughts about allowing a passenger to occupy three seats when others are crowded? Should the FA have reacted differently?