What are they trying to say??

Or there's the possibility that someone just fancies the contents of your wardrobe as they are amazed by your wonderful style, and are saving up their own charity bags waiting for your clear out.

You've just managed to uncover an evil plot that they've kept secret for decades Wizzy, so I'd up the ante on your home security if I were you! The "powers that be" are trying to remove us from materialistic dependencies such as clothing, so we may return to a caveman-like lifestyle and become more controllable. The second a bag turns up that's big enough to hold your furniture, I suggest you find an isolated island somewhere and flee to it. As for what they DO with all the collected clothing; it's recycled into the very bags they leave at your door. The plot thickens!

If they were to give me a bag, to put clothes in, I would give them my old clothes, and if they put another bag on my porch, to collect some more, then they wouldn't get a thing, some people are just geedy, they want everything that you have, well they won't get it some people just take thing too far.