A critical mass of exJWs is gradually being reached. Perhaps eventually, there might be several in each town.
Inevitably, faithful witnesses will call on these ones, unsuspecting of who they are, what they believe and such prepared demonstration of "how to place the magazines" will not go down well.
Reading the many experiences here, for the most part, many exJWs try to plant a seed in the mind of the Witnesses.
This seed may be discussed with other members of the car group. The conversation may go nowhere, but a seed has been planted and someone or something will keep on making it grow.
Thus spread the seeds of doubt and discontent.
It's the converted preaching to the unconverted who in turn witness to the converted.
The Society have a real mess on their hands - exJWs are no longer an unknown quantity, a fringe element. They are growing in number and the internet allows them to organise campaigns, contact the media and spread awareness of Watchtower untruths.
Perhaps a new tract is in order?