My first thought after reading your post was that maybe the family you knew, has moved and the women you saw that day weren't the same ones you used to know. ( hope so )
My second thought was that often, when people leave the JW's and don't have a firm conviction that they were right in doing so, will sometimes gravitate towards the things in life that aren't worth having or doing, simply because they feel they are now wicked. They subconsciously think that since they aren't JW's anymore, they are part of the wicked world they've heard oh so much about. Instead of realizing that non JW's can lead clean healthy productive lives, they go straight toward the destructive behavior that is always highlighted in JW literature and in the stern admonition at the meetings.
Ships are safer when they are tied up in the harbor, but ships were designed to sail the seas and be useful. The vast majority of them are able to safely navigate the stormy seas unscathed. Like a ship tied up in the harbor, there is a certain amount of protection from bad habits (smoking drugs etc) that can be attributed to the JW way of life. However, like the ship that safely navigates the sea instead of staying safely tied up in a harbor, people who cut themselves free from the overbearing restraints and misguided and untrue teachings of JW's, can and often do, live a healthy positive life without being bound forever to a cult.