To some graffiti is an art form worthy of display in galleries but for others it is merely vandalism. As graffiti can be done on any property, it is seldom considered an art form as it might be deemed to be destructing someone else's property. Furthermore, graffiti also contributes to certain illegal activities. One such example would be that graffiti is used as a gang signal to mark territory or serve as an indicator or "tag" for gang related activities. If graffiti is done on a specified platform with a positive purpose to it, it would be apppreciated as an art form. Till then, graffiti is still considered to be vandalism.