Like it was said above, the Laws of Magic don't care about Morality, they care about the big things. You can use magic to rob banks, to make fake gold, to do all sorts of skeezy, illegal stuff. As long as it doesn't break the rules of magic, the White Council doesn't care.
They don't do anything about Binder because he didn't break the laws. The circumstances are skeezy, and treading close to the line, but doesn't cross it. However, they do monitor him, as shown by Morgan and Harry's actions and thoughts in Turn Coat.
They got involved in Ascher's case because she killed a man with magic. Without someone to stand before the Council for her, they don't care about the circumstances. They only care about the end result. She killed a man with Magic.
Just like using the love potion to get with someone is totally wrong and illegal by most mortal laws. But the Council doesn't care about mortal laws. Just like how it didn't get involved in the World Wars, just because someone finds it repugnant and illegal, doesn't mean it is to everyone.