Careful whom you choose to follow. Twitter is the best thing that happened to Internet since email. It’s not the idea of what your following but in principle what kind of people you surround yourself with who can impact you. I haven’t experienced any abuse personally but I read about it in the papers, on the news and around the Internet. I tweet responsibly. I read mostly information and interests of people than just themselves or their point of view about something. May be they are all not personal and vocal in their tweets which is okay. But if you are only following people for their introspection on something then you would probably need a statutory waring or a word of caution. Abuse may cause a bad experience but it certainly can’t make a product or service like Twitter bad. The same is true with every other social media. It’s up to us to make Web a better place.