Occupy Cleveland canceled May Day protest plans to march in the city because of this:

[ellisonz]

54. Why keep beating a straw man?

Occupy does not have the physical power to stop this, the police do, why don't you ask why they're more busy attacking unarmed protestors than stopping the black bloc types.

Many people, armed solely with moral authority, not lifting a finger in anger, can turn back a few bullies intent on chaos. You do it with numbers, you do it by making your disapproval clear. You use WORDS.

Occupy has made its disapproval clear.

Occupy Wall Street is a leaderless resistance movement with people of many colors, genders and political persuasions. The one thing we all have in common is that We Are The 99% that will no longer tolerate the greed and corruption of the 1%. We are using the revolutionary Arab Spring tactic to achieve our ends and encourage the use of nonviolence to maximize the safety of all participants.

This #ows movement empowers real people to create real change from the bottom up. We want to see a general assembly in every backyard, on every street corner because we don't need Wall Street and we don't need politicians to build a better society.

http://occupywallst.org/

What you are advocating is aggressive confrontation likely to provoke violence. Honestly, ignoring the anarchists is probably the best way to neutralize them otherwise they have succeeded in co-opting the movement. BTW - when was the last time you went out in the streets and protested?