I admit to mild irritation when someone I follow because she posts cool recipes goes on a flower posting spree, but that is my problem, not hers.
Why not just unfollow her flower board?
Some people don't organize their boards very well.
Exactly. In this case, the person is actually hyper organized and has too many boards. She often creates very specific boards (Chinese Banquet recipes, South Pacific fish recipes, South Pacific side dishes, etc - ok, I am making these up but you get the idea). Instead of checking every so often to see what new board she has created, I just follow her. I would never complain that she uses Pinterest in the way she prefers.