Same thing happened to me on a recent flight KWI/RUH on SV.Was first pax in F to reach the plane Y was filling up fast but not one bin in F was empty all packed to the edges.With my CPAP in hand i always carry it i called to F/A and told him about the problem.Well what came next was a surprise even for me.He stopped boarding and annouced the following"unless all passengers come and collect there items in F he will download them in KWI"Well in less than 3 minutes all bins were empty,great move because F on that flight was also full. ^