Have violin will travel

Saturday we decided to go see the "Hundertwasser haus" which was quite fun. On the way there we saw this guy playing his violin for pocket money on the U-bahn.  After he finished playing, I gave him some change and as he was getting off the train he was arrested.  Still don't know if it was for begging or if he just didn't have a ticket to ride.  We left to explore the "Hundertwasser haus" and I was wondering if poor Freidenreich Hunertwasser was ever arrested for expressing his artistic abilities..........