In the past ~15 years, JWs showed up a whopping two times at my door (when I was home). Incidentally, last time was a couple of months ago. The usual pre-memorial leaflet campaign. They put up their best smile, quickly mumbled the "invitation" line, thrust the leaflet quickly into my hands and were gone before I could say anything. A fine witness indeed!
During the same 15 years, I had dozens of visits from people soliciting donations for charities of all kinds. They were usually a lot more effective in getting their message across.
The JW door to door preaching is just pathetic.