I think that a pole holding up the sign for more people to see and so that the bodies of the Attendants would not be able to block it out would be much better.
I also think that the message would have to be short and east to remember.
My all time favorite would be " JWFacts.com " as it is easy to see to a glancing eye and viery short and easy to remember. States that it contains facts and if and when visited, it would allow the reader to easily navigate to something that interst them.
I think that when a person puts too much info on a banner, sign etc trying to explain UN/NGO, Mexico vs Malawi it get too crammed and hard to read at once. And you know that a true JW does not want others in the area seeing that they are taking a peek.
NJY