Not only do Witnesses generally not engage or contribute to charitable works, many actually think that it is wrong to do so. Paranoia over contributing to "Christendom's organizations", fraudulant charities or otherwise wasting valuable time and finances that could be spent on the preaching work - the only "real and lasting solution to mankind's problems" - prevents most from having any involvement with charitable organization. This gives many JWs who are cheap legitamate sounding excuses.
This negative thinking has been heavily influenced by the WT and you will note this if you do a search for "charities" in their publications. I think the WT realizes both time spent in preaching and funds donated to them would decrease if they gave the thumbs up to charities.
I have a feeling their position on this will change in an effort to clean up their public image, but for the moment the state of this huge "charitable" organization is absolutely pathetic.
Path