I say: PL leagues are 'arcade' mode, you don't get a flag.
If you are in a soccer team in real life, and you play international games and get those players' flags, does that mean you will receive a flag if you play a soccer game on computer? no.
This might not be good example for 'arcade' but when nothing affects the game, NOTHING should affect the game.
Should PL games start to produce flags, I personally will stop being part of the flagchasers. I do not wish to put extra time in the game which I otherwise would not, just because I need to keep up collecting flags.
Besides, joining a PL league would not bring me any fun since I never can watch a Friday game live, I would only join becasue I want the flag, not caring about my line-up, how interesting would that be for the other participants?
They are not your friends; they dispise you. I am the only one you can count on. Trust me.