[MortenK]

Probably the guy broke a rule, or could at least be interpreted as breaking a rule.

However, the infraction is so minor compared to the penalty. The guy wants to travel around the country and play music for free at a variety of venues. He can't do this because that's considered work.

That really shouldn't be grounds for detaining, rough interrogation, strip searching and finally deporting the guy, all the while not allowing him to communicate with the people who are waiting for him.

Such rules really shouldn't be considered acceptable in a free and open country.