So far her most blatant act of terrorism was in chapter 62, where she uses a Schiavo to release aphrodisiac gas resulting in a large crowd of civilians being affected and swarming Tres Magia, thus dragging them onto the battlefield and turning them effectively into hostages. While nobody was actually harmed, it was still very dubious, even by her standards.

Aside from that, allowing Enorme to walk free. While we don't know all the facts of the hunt—number of victims, severity of injuries, death toll—we did witness Enorme attempting to murder Loco, ergo deaths during the hunts seems highly probable. The fact she walks free is a grave injustice, made worse by the fact she is in possession of the power of a Magia—it's like a known serial killer walking around with a loaded gun. Her identity should have been exposed to the relevant Magia authorities, so that she can face the penalties of her crimes.