So I've been studying this for a while and haven't really formed a proper opinion yet because I am still the study stage. I can see points on both sides; how they help and how they don't. Say for example, there was one about child abuse (I am sure there's a plethora of them) where it talked about racial issues. I can see how it would raise awareness and show that people need to do something to stop it (calling the cops and separating the child from danger in these situations are good places to start), but I can also see how this would go wrong. People don't know they are actors. Down where I grew up, you did that you'd have so many people on you that by the time whoever was filming was able to tell them that it was an experiment it might be damn well too late for the actor(s). To be fair they did this in the middle of a city on a well used road or a park. I can also see how social standards fall into place; typically if people don't see others stepping up to help they too will walk on by. And it all depends on what the experiment is, but part of me wonders that if the ones that responded are in on it (I know that isn't really a fair assumption, giving people the benefit of the doubt is something I personally struggle with and have to work on). Most of them I can tell in their expression that they are being genuine.