Tiny update:
I noticed a few weeks ago that when I looked at photos of friend, I could see no more business wares, just friend or her family.
I thought that somehow the business had blocked me because of the "report spam" or something, but I could still see the business' page and my husband could see the same photos of friend.
I assumed she got fed up with it too.
For a few weeks there were no taggings (it's August, I'm guessing business owner was on vacation) and then last week there were two.
Today it seems that friend has untagged herself from these photos as well.
Looks like friend has found a compromise: she lets the business owner tag her, leaves it up for a few days and then removes it. The photos still pop up on my feed, but I can block that and
if I go to friend's page I can see photos of her, and not of business wares!