Graffiti can be thought of as a part of hip hop or street protest. It is often but not always illegal. Some cities have small areas where graffiti can be made. Sometimes graffiti are very beautiful. Some people consider graffiti as not only something bad, but something good, like art. Some people pay graffiti artists to do graffiti on their buildings. In the 1980s, some graffiti artists like Keith Haring became very famous.