Hi All,
Have you contacted the "offender" and asked them to edit their tree to a) indicate they had obtained this info from you or b) make their tree "private" and invite family members to have access to it, including you?
I shared info directly to one of my late aunt's grandsons, including a recent photo of myself outside the home that his late Dad (ie my first cousin) and I had lived in when we were both children. He uploaded it to his ancestry tree. Another first cousin spotted it and phoned me to complain as it was clearly identifying me and she was quite put out. I contacted him, he was all apologies, he had been under the mis-apprehension that his tree was private, and he removed the photo and also made sure his tree was private. All sorted, and mended without much hassles at all.
Cheers MA