The ISHRS is a teaching organization, and anyone can be a member. Membership doesn't mean anything, except the doctor paid a fee to join the group. The ISHRS don't have any kind of rules of conduct (only suggestions) and they don't have any enforcement ability - if a doctor sucks, he's not going to be barred from the ISHRS, or fined, or disciplined. The ISHRS doesn't do any of that.
You may be thinking of the IAHRS, which is a smaller group (overseen by Spencer Kobren) but even in that group, there is no policing or enforcement of rules. I only know of one doctor who was removed from the IAHRS, and that was over 10 years ago, and may have been a political issue more than an issue of quality. I know that Dr Cole is still an IAHRS member in good standing, even though he has numerous ethical issues including disciplinary fines ($20,000 fine from the state medical ethics board of Georgia in 2010, and $20,000 fine by the state of California medical ethics board in 2011). Yet the IAHRS has taken no action against Dr Cole. If Dr Cole can't be removed from the group, then it's probably impossible for anybody to be removed.
"Do your research" is a good recommendation, except none of the research is conclusive, and in many cases the usual common sense guidelines (pick a doctor with lots of experience) can be totally wrong (some of the doctors with the most experience are also the worst doctors in the field - they have lots of experience in doing bad work). This is basically a minefield with lots of hidden pitfalls and problems, and very few trustworthy resources.
I don't know of any cases where the patient's bad results were his own fault. I've never heard of that before, not even one time. It's kind of offensive to even propose the idea that bad results might be the patient's fault. Also, teaching the patient after-care procedures are the responsibility of the clinic. If the patient actually did do something wrong, then it's still the clinic's responsibility, for not teaching him how to properly care for his grafts. I have to believe that many clinics need to do a better job of educating the patients, because the forums are filled with guys asking the most basic questions (when can I start shampooing?) which obviously should have been discussed by the clinic to begin with.