My brother would actually be suited for this kind of job... He's autistic and struggles to do what games tell him to do (unless he feels like it). As a result he'll go around trying to jump into everything, trying to make AI characters glitch, trying to make stupid things happen etc. Because of the autism, he'll do it in an obsessive way without getting bored, which makes him very effective.
The best thing he ever discovered was in DRIV3R: He found that if you jumped up stairs at 45degrees, you would be hit by an invisible car. It's extremely frustrating to watch him but he would very much get the job done.
/thread hijack