Not that we were lazy but with some of the neighborhoods we just didn't see any harm in putting cards directly in the mailboxes.

You're setting that woman up to be harassed and conceivably are putting her in harm's way by keeping it up.

There were 11 vehicles parked on my lawn, the door was wide open, and a sign posted on the wall next to the door read "hazardous chemicals have been removed from this home." 

I see No Harm.

No harm in that at all.

Such as what will the Federal, state and local Governments do to offset it, (some areas take steps to uplift their residents lives, and some areas give only lip service to it steering money to certain things that do little but continue the suffering as a profit center--such as some areas helping the homeless by giving them shopping carts vs really helping them).Also the underlying industry base will play into it, for instance Houston makes chemicals that are used worldwide in other industries, is that a positive or a negative---(and for how long) time will tell.