do we need unlike?

[kirstykitto]

Probably... just realised it is not there, but is definitely something you can do. Its in activity streams too. (See http://activitystrea.ms/unlike)
In the activity streams profile too:

{
       "id": "http://activitystrea.ms/unlike",
       "prefLabel": {
          "en": "unliked"
        },
       "definition": {
         "en": "Indicates that the actor has removed the object from the collection of liked items."
         },

       "inScheme": "http://activitystrea.ms/schema/1.0.0",
       "type": "Verb"
},