Our congregation has evening witnessing. It is used primarily by the young pioneers to date one another. It bothers me to call on someone who has just had a busy day at work, a hard or harried commute home, family responsibilities to care for when they get home, and expect them to listen to something they have already rejected many times before.
I think the problem is not that we call at the wrong time. Whenever we call, the majority are not interested. They are satisfied with what they have.
If we are really lovingly concerned with individuals, why not respect their right to be left alone? We demand religious freedom for ourselves, why is it so hard to extend the same to others?
Oh, I forgot...we have the "truth" and they do not. But it is a "truth" that is always changing and being corrected...