Parent and child spaces

RANT - So I was shopping the other day to get Calpol for my daughter who is just over 1 and had a slight fever. I had to take her with me as there was no one else to keep an eye on her. I just about managing to get a parent and child space (I had to drive around a session time). When going back to my car I saw a couple returning to their car. They were parked in the park and child bay. Young couple no child or blue badge. I was going to say something but they were a few cars down from me. Then on my right a man was going back to the car next to me. I thought surely he has a child with him. Nope he did not. No child no badge. So I asked 'just curious why have you parked in this bay without a child with you. You have parked in a parent and child bay' his response was I don't have to tell you. It seems like people are parking in those spaces more often without children with them and it makes me frustrated and angry as people that really need them then don't have them.