If you've been in the white-collar job market for very long, you have undoubtedly come across recruiters who exhibit questionable ethics.
The most common way I've seen this manifested is when the recruiter oversells you as a candidate to the point of exaggerating your credentials to the point where it is extremely uncomfortable when you get asked about a particular skill that you don't have or at least not to the extent you have been sold to the company by the recruiter.
The worse instance I've seen is a recruiter that called my office to try and headhunt me. I was out of the office so they used the company directory to get someone else, lied to them saying that I was moonlighting for them on a programming project, then asked if there were any other programmers they could be transferred to that could also help them with the "project" I was supposedly doing for them on the side. At first I had no idea what was going on, and it took a while to convince HR and my boss that I wasn't moonlighting against company policy and this was just a recruiter fishing for more programmers to entice out of the company.
Ultimately, karma bit them in the butt when I was promoted to a manager position and potential customer for a staffing company. I told the exact story above each time their sales people called me looking to place candidates and told them I would never ever work with their company and advised fellow managers against using their firm also.
Luckily I was in a situation to make them regret their unethical behavior, but I'm sure I am in the minority. Does an average job seeker have any recourse when they encounter an unethical recruiter? For example, is there a professional association for recruiters that they can be reported to? Does it do any good to contact the recruiter's company and report them directly?