The word "terrorism" is bandied about a lot today. The accepted definition of terrorism is and attack carried out by a person or group of people in the hopes of instilling fear into a populace. Normally, the attack has attached to it some sort of demands.
Would a group of Occupy Portland hoodlums firebombing a luxurious building count as terrorism? I think so.
Police in Portland, Oregon suspect a group of OWS protesters in the firebombing of World Trade Center, a building that caters to business conferences, weddings, and other gatherings. In the attack, criminals threw a Molotov cocktail into the building, causing a fire which damaged stairs.
The Portland police suspecte Occupy Portland of the crime, as protesters have been causing violence. Here is the internal police memo that went out: