I think it's just plain stupid not to immunize a child against tetanus. However, I am not in favor of the standard approach to immunizing children, which is to combine three shots in one. I required separate injections for my daughter, spaced a reasonable time period apart, so that her immune system had time to adjust to each one.
Edit: I should add that adults who are going to be near infants and young children *really* need to get the pertussis vaccination. Many adults don't, and it puts the children at risk.