James Mixon, "Billboards signs "Why do JW's break up families"?"
The sign may be a good idea but I believe those messages should be targeted at JWs with the public simply observing it. If you make a statement questioning the Watchtower most people will not give a damn since it won't affect them.
"What do you say Simon???"
I think Simon has his hands full so somebody else should take responsibility. The sign should direct people to this site though. However, that will set him up to judicial harassment with threats of lawsuits no matter how it is posted. Yet, in order to be effective, the message should be a strong one.
The sign should be located in a busy urban area to maximize viewers. One thing to note is that it may not be worth the money for the results. Let's not waste effort and resources for something that will be a tempest in a teapot.