Maggot isn't the type to take heads off. That's more in the field of expertise of one of his fellow X-men temps.
His field is more super strength, moral integrity and disposing of undesired materials or technology.
I guess the logic was if everything belongs to everyone, nothing can be stolen.
In general it seems a lot of Krakoa works on an honor system. Which might work for a small anarchic community, but when it's a full blown nation, filled with villains and other people of potential very low ethics, it might really not be the best idea to depend on everyone's decency.