If someone is going in to a situation where they know there are armed riot police, armed federal agents, armed and agitated protestors, and several people have already been unalived, I would call them nothing but "suicidal" to carry their own weapon into that situation. Suicidal. Even when concealed and unused. Suicidal.

Of course they would be suicidal to go into that situation unarmed, as well. But carrying a weapon would be double-plus-ungood and guaranteed to make them a target for unaliving, sticking out from amongst the crowd bearing rocks and sticks or even Molotov cocktails.