One of the most harmful long-term effects of bullying, in my experience, is that it causes you to lay down thinking patterns that lead you to accept helplessness and apathy. In my case, I soon realized that there was nothing I could do to stop the other children mocking me and holding me up as an object of fun. When they harrassed me, all my options led to the same result. If I ignored them, I was hilarious and so mocked further. If I answered them politely, I was hilarious and so mocked further. If I answered them angrily, I was hilarious and so mocked further. If I danced around and clucked like a chicken...well, that would be no more hilarious and mock-worthy than anything else I did. In hindsight, I can see the effect it had on my thinking patterns; setting up a block that shuts the mind down when confronted with any sort of obstacle or interaction, because my experience is that it will be painful and humiliating and whatever I do it won't bring me any success. It really did lay the foundation for one of my more troublesome traits, which is to see life as a set of obstacles that I just refuse to face because I'm convinced "I can't do anything other than be knocked along passively by these waves".