Exactly. It wasn't like Severus was innocent there. And the twins always picked on people who were either deserving (Montague) or too full of themselves (Percy). I still love the bit in the OotP film where they comfort the first year, because that right there is how I write the twins.
I agree about Ted. :( And I think you're right--still, I write Remus and andromeda as being friends because of Sirius, so that part of canon does not match my vision of her AT ALL. So I ignore it, because I see her as only wanting the best for her daughter. Remus/Tonks is pointless anyway.