May Day! May Day!
Parades usually see the populace thronging the sidewalks to applaud the paraders. May Day parades, however, usually are regarded as threats to the peace, a kind of annual "Occupy" protest that is run (like Occupy) by individuals who have no regard for others. Accordingly, instead of setting out lawn chairs to watch the fun, offices along the May Day route in Seattle this year, as in other cities, are closing down early and getting out of the way.
The far left is not as agitated now as they would be if a Republican were President, but they never lack for manufactured indignation. Each subgroup will have its own cheeky assaults on good taste and decorum. Police are schooled in tolerant tactics that let the paraders/demonstrators have their way right up to the point--and usually well past it--where windows are broken. Certainly there will be no limit on noise. The whole point is to disturb others and make normal business impossible. Here come the same old drum corps, the same old style of chants and all the retread tactics of the anti-war movement of the 60s and the anti-nuke movement that preceded it.