Journey Man I said before, I do think the cart witnessing itself was not a bad idea, but the way the org has implemented it is totally ineffective, telling publishers not to engage passers-by unless they are first approached.
When it was first introduced (here in Europe at least), publishers could offer literature held in their hands, and could engage passers-by in conversation. That seems much more appealing (to those who might be interested, of course) and more potentially effective
I think worst thing isn't just that they don't actively engage people. The worst thing, at least for me, is the fact that if anyone does approach them all they do - all they've been instructed to do - is direct you to jW dot org!!! They won't seem to discuss anything but their ruddy Website in all its thousand and one languaged glory!!