A company tried this, selling ice cream made from breast milk a fee years ago. They got shut down by the government, I believe FDA, even though they processed the milk like companies do with cow milk etc.
Add on info: it was a London company in 2011. You could get a cone for 11 pounds. It was outlawed. The FDA used that to remind everyone that it was illegal and to check the rules for sharing established much like a blood bank rule set up.