In my household all vaccinations are controversial! I have sometimes had puppy vaccs done, but then there have been pups who have never had a single vaccination in their life. Boosters have never been done since you can't boost the immune system. You either have immunity or you don't, and if you believe that vaccinations work, then they work for life. Lepto 4 would never ever be given to my dogs.
I have an 11 week old chocolate roan and tan pup, she had her first vaccination while she was still with her breeder, but she hasn't had anymore since she came to me. She has been out and about since the day I had her. She has been on the floor in pet shops having a wander and meeting people. I believe in building up natural immunity.
If you intend to vaccinate you can still take your pup out and about, just carry him and let him meet people and have cuddles with them. If you don't want to vaccinate, just take him out and about and build up the natural immunity. The only thing I do if not vaccinating a pup, is I am careful where I go, or where I put them on the floor in the first few weeks.