Ah ,this is the answer,some kind person is having fun with this add on and targeting people they do not like.There does not seem to be a maximum number of dislikes that you can put up, so my moron friend is putting dislikes on everything including postings to me by my friends.
Now you would think that Facebook would put a stop to this add on .
It obviously amuses this person to put a dislike on all and sundry and with any luck a call from a couple of white coated gents may put them in a padded cell where they belong.
Al