Albert Parsons was one of the five Chicago Anarchists who were tried in 1886-1887 and executed in November 1887 for their role as 8-hour working-day agitators and as anarchist militants. Anarchists are decried as dangerous by cops, politicians, and the rich, if anarchists had their way those roles would no longer exist. So yes, Albert Parsons may be considered dangerous for being an anarchists.
