We have stores that have receptacles for used bags and guess what I forgot to bring when I went to the store this morning? BINGO, my plastic bags to be recycled. Oh well, next time I'll take them as I go to the store often enough.
While I'm not really sure, I think that it comes from our younger generations who seem to have little or NO respect for a lot of things that we were taught to respect back in the 50's, 60's and 70's.