@forecast Unlike an ant colony though, he could pick them off and get the information needed, so he wouldn't wander around aimlessly, at least not in the city, as far as the organization is concerned. On high levels, they also tend to leave records behind about activites, so that's enough to get authorities off his back even if he goes up against the higher ups. Instead of dealing with the problem, he just rans away, which inevitably will lead to newer and newer problems with them.
@Vincentius He could set up slimes or other monsters as guard. Hence the OP thing and the illogical plot behind this.