"The growing support for the OWS movement has expanded the protests' impact and increased the potential for violence," said the report, released as part of a joint document dump by WikiLeaks and Rolling Stone. "While the peaceful nature of the protests has served so far to mitigate their impact, larger numbers and support from groups such as Anonymous substantially increase the risk for potential incidents and enhance the potential security risk to critical infrastructure."

Cummins said the incident is a "wake-up call" for 'Occupy Cleveland' leaders.

"They need to step up and get organized," Cummins said. "They need to be aware of the dangers that the ideals of the movement could present.

Said King: "Irresponsible words have irresponsible consequences. Once you have something incited you can't stop it."