Here is a resquest of a player in the lichess feedback forum: http://fr.lichess.org/forum/lichess-feedback/reading-the-notes-people-left-you-#2
And here is the answer of o moderator and lichess developer:
It's Intentional, for similar reasons why we don't show the names of the people that blocked you. It can create an unfriendly atmosphere, because you never know what note someone leaves. At that point they'll become like brutal MySpace comments, which were one of the reasons people left en masse to join facebook instead.
I hope i helped you