We should also be aware of the level of abuse to be found in many bio families as well. Believe me, many foster children are there for valid reasons.
I find many people are in fact aware of this. The awareness of people with high status being potentially abusive isn't there. The issue of class differences, education and how well people speak, things like that... it really can impact naturally on people's perceptions because very bad people can be capable of hiding what they're really like. It's like the difference between BPD and ASPD. One has empathy, one doesn't. But the borderline may be reactive and the antisocial calculating. Times of crisis with borderlines can be very serious but often otherwise stabley unstable. Imo. I find a lot of people are snobs too.