I have definitely been interested to know who has nuzzled me in the past, but a part of me also would like it to remain a secret—I greatly enjoy the anonymity to the feature, and I honestly feel it would not give me the same twinge of happiness if I knew who nuzzled me. It's like a fun little mystery. The only thing that would be notable to consider regarding such a feature would be "nuzzle spam," which honestly probably would not be an issue on the FH forum, considering does not cater to a massive fan base.
Regardless, I am indifferent to its implementation or not. It would definitely be a neat little addition and would definitely clear up a lot of past questioning, though!