The reason you can't dislike things on Facebook is that what Facebook calls a "like" is not a rating, it is actually a connection.
They are building a network graph, and the opposite of a connection is not-a-connection, which is the default state.
There's nothing "lower" or "worse" than the absence of a connection. This is sort of like the old joke that the opposite of love is not hate, it's indifference.
Comments
The reason you can't dislike things on Facebook is that what Facebook calls a "like" is not a rating, it is actually a connection.
They are building a network graph, and the opposite of a connection is not-a-connection, which is the default state.
There's nothing "lower" or "worse" than the absence of a connection. This is sort of like the old joke that the opposite of love is not hate, it's indifference.