Right, like I unfollowed you, kid, but no hard feelings, I still give you a nod when I see you around. No need to block.
I unfollow lots of people for reasons like - I don't like seeing lots of reposts in my feed; I don't like NYC or NYers telling me how great they and their city are; I don't smoke weed and don't need a bunch of notes about it...
I also use lists, so maybe I don't follow you and added you to a list instead. Got a good list of meme posters going, for example.
And I scan Global, so maybe I'll just catch you outside.