The problem is, when they end up not getting their way, they will turn violent. In fact, you can already see it happening. Case in point, the destruction of property they deem inappropriate (SUV's, Hummers, Home developments).
This is the same as it was in China during the cultural revolution. Students, idealist came into homes, took all but the most essential material possessions, piled them in the street and burned them. Women with fancy hairdoos forced to get a haircut before they were allowed to board a train.
These people, their ideals are very dangerous. Under the guise of what they call a better way, if given the opportunity, they will take us where millions have so tragically been taken before. It can happen much more quicky than you can ever imagine. They should be resisted at every turn.