I really don't think they are encouraging irresponsible riding. They work very hard with their safety campaigns etc, and the one-way system is an attempt to contain the situation.
The culprits are arrogant prats who come across here thinking they can behave in ways they know they would not get away with at home. The new prison may be busy!
They are encouraged by irresponsible reporting and the "wheelie" mentality of MCN.