Ive never in many many times aboard a SWA plane been asked or expected by any FA to organize the cabin.

That being said if someone wants to don the gloves and go all garbage collector have at it. I am not paid for that.

As far as sitting in the cabin. Sit where you want. The mentality of "Sitting in the back" is an old thing and nowhere in any FOM AOM TOM BOM or any M I have seen.