Lets go back to the OP.
She writes that she saw two nursery workers in a public house, next to the nursery. She said they had a glass in front of them and two empty glasses still on the table.
She has a child at that nursery. She thought it was not a suitable place for two of the nurses who had charge of her little one.
Then she said she wanted to complain anonymously , but the nursery workers saw and recognised her. She was afraid that if they lost their jobs because she had reported them, they would know who had done that, and her and her child might be endangered. Through their belief that they would not be discovered by parents, they instilled fear in the OP.
I am not alone in saying that nursery nurses should not drink in the pub next door to the nursery. It is not illegal. It is, however, unprofessional, and I would bet that every nursery, school, has a rule about not drinking alcohol in public. Some might even go as far as to ban a nearby hostelry.
In fact, I would imagine there are guidelines laid down by whoever issues the nursery licenses and inspects them. If any of the posters who do not agree with me can show me where there is no such standard/code of behaviour in the licensing and inspectors of nurseries, I will give up. I would not renounce my opinion, but I would have to acknowledge that the County Social Services, The QCQ and other bodies don't see a problem
If I were the OP I would take my child out of that nursery and tell them why, and be a bit more careful where I place the child again.
My comments have been against the nurses drinking in the pub next to the place of their employment. I said I did not think it appropriate. I still don't. I think that mother was absolutely right that she did not think they should be drinking alcohol. She would have known the difference between wine and fruit juice.
Those employees were bringing their profession and that nursery into disrepute, because AT LEAST ONE OF THE PARENTS SPOTTED THEM and didn't like what she saw. She wanted to report them. Did she have that right? She most certainly did. What she was afraid of was the revenge they could give her and her child because they recognised her.
None of us were privvy to that look. From it the OP determined that there would be recrimination if she reported them, and was afraid. Why would she feel afraid if they were innocently having a drink before going home for the day?
She had caught them doing something they should not have, because they did not expect to see one of the parents. They thought they were safe.