What's happened so far is that a Town Meeting Member has announced his intention to place a citizen's article on the warrant for the upcoming spring town meeting. There's been no publicity so far, other than this thread, because it is indeed premature. I happen to monitor the Town Meeting Members chat board, which is how I found out, and alerted this group (as well as GOAL).
In late winter, the warrant will be published for the upcoming town meeting. No doubt this article will get some more publicity then. At that point interested parties should notify the moderator of town meeting of their intention to speak to this article from the gallery when it comes up for consideration. This step is important, as the moderator will know to alert you which night this article will come up, and have you on the schedule to speak. You'll be limited to 2 minutes, so have your remarks prepared. I'll also post a notice on this list. The more members we have supporting the cause in the gallery, the better. Despite this, I expect it will pass if it comes to a vote.
As I mentioned in an earlier post, the best way to defeat this is to credibly threaten a lawsuit. The town will not want to spend real dollars defending a meaningless, symbolic, feel-good ordinance, and will pressure the proponent to drop it. The selectmen may even recommend a no vote if the proponent presses forward after they've asked him to relent. While the membership occasionally defy the selectmen, it is unusual.