Seems like a highly justifiable list of groups to support, and I certainly support your choice of not wanting to be bothered forever afterward by them. My mother is being buried in paper begging from organizations my parents have supported over the years, and is getting less and less tolerant of it herself.

I'm somewhat United Way phobic myself, I think due to how they've handled some workplace collection work in the past. Haven't looked into them lately to see how their recent behavior is going.