They call themselves 'Red Guard' and love Mao;

tell me again about how it's overreaction to worry about these assholes?

In the blog post, the Red Guards of Austin called on the "masses" to unite under Maoism and establish "a mighty Red Army" to allow "self-administration of the community under the protection of this army, forming a new state posed to make war on the old":

This great change does not happen overnight or all at once. It occurs through the course of organized class combat, class against class. The necessity of revolution must be grasped and this matter can no longer be delayed by the clownery imperialist elections. Develop the combined strength of the proletariat, its allied classes, the Party and its Red Army.

The menacing post ended on a revolutionary note:

Boycott the Bourgeois Elections! Elections, no! Revolution, yes! ... The ruling class will rule no more! Revolution, Peoples War!

And how's your ammo stash?