Never hooked one out but you can definitely use a fish trap to remove them. Just takes patience.
Another typical good citizen worth considering that has unique markings is the scribbled rabbitfish (Siganus doliatus).
Like I said, its really a matter of luck as some individuals will behave in a reef set up. Others look at corals (soft or sps) like its pumpkin pie. I got lucky with mine (knock on wood). He's been in there about 4mos and is well fed. If you pick one up from salty, make sure you ask to make sure its not the one that was in their frag tank.