I don't understand why this is true: my crooked peer can route both ways if you have some other way of 'checking' on my routing. Or I can be right next to you a

I don't understand why this is true: my crooked peer can route both ways if you have some other way of 'checking' on my routing. Or I can be right next to you and pretend to be in Asia by offering bad GPS coordinates and auto-lagging my response times. No?