It's the way of the comic that an army of soldiers can move through town and no one even thinks twice about it. Good for comedy, of course, but if you try to think about it logically, it's highly suspect.
So don't think about it.
But, at least Shredder listened to his dead adviser.
 
    

When evil spreads across the land, and darkness rises and the monsters roam. When the creatures of the night make beautiful music, and the things that go bump in the night go bump with greater enthusiasm. When the world is in peril and is in need of a hero...

These guys are, sadly, the best the world can hope for. These are the adventures of the heroes of CVRPG. They mean well, they try hard, and occasionally they do the impossible...

They actually do something heroic.