If you don't own a train company then you go and paint on one instead... it all comes from that thing at school when you had to have name tags in the back of something... that makes it belong to you. You can own half the city by scribbling your name over it.
BanksyYou owe the companies nothing. You especially don't owe them any courtesy. They have re-arranged the world to put themselves in front of you. They never asked for your permission, don't even start asking for theirs.
BanksyOn Painting Rats, and the Glorification of Them. They exist without permission. They are hated, hunted and persecuted. They live in quiet desperation amongst the filth. And yet they are capable of bringing entire civilizations to their knees. If you are dirty, insignificant, and unloved then rats are the ultimate role model.
Banksy