Sorry, I think you will find right now that because Kroger's has responded appropriately, that not many are going to be willing to participate in this nurse in. Nurse ins are typically reserved for when the company has not responded in an acceptable manner (ie not admitting their wrong doing in the situation, or claiming that they were correct in how they handled the situation).
I have had this happen to me twice in recent years, even after the law was put into effect. One at a local resort, and I came here for advice. I contacted corporate, thanks to information I got from someone on who to specifically contact. They were willing to take suggestions on how to improve things and also on how to make nursing moms more aware of private places to go nurse that they have available.
Second one happened a few weeks ago. I was at a play date with Le Leche League, and was asked to be more modest at a local eating place (with a kids play area in it). The LLL Leader contacted the owner (as they were acquainted with each other) and let them know what happened. Again, there was an apology given to the Leader for what happened and they talked with their employees about the companies position on the subject, which was along the lines of LLL.
There are better ways to educate and inform than always having a nurse in. Many times it can be resolved internally with corporate. If we are constantly calling nurse ins when corporate responds in the right way, then it only hurts our cause, not helps our cause.
The poor mother who had the problems with Fairfield Commons Mall got all sorts of negative attention for this, and that was just 3 months ago. In that case, the Mall did not properly handle the incident nor were they willing to admit so after the fact. Hence the reason for the nurse in.
Additionally, under Ohio's Law, you cannot sue the company for the violation of her Civil Rights. It must first be handled through the Ohio Civil Rights Commission. There are no provisions under the Law for an individual lawsuit at this time.