You're right Tomasina, just because a person was from the Slytherin House does not make them a bad person, I am sorry for my prejudice in other threads. It truly does depend on the person and not the house they are from. D.E.
are likely to have originated from all sorts of houses, it's a persons choice to be who they want to be.
It's horrible Slytherins are veiwed in such an unsavory light when every house has equal chance to have some one there to mean, or grow up to be evil because each house may have it's values but it is a persons individual choice what they choose to make of themselves.