Sure. It's safer for the people who've done the magic and safer for the people affected by it.
Seems like it should be more of the same, then? As for how it changes things with Emma, couldn't say. She shouldn't be a scapegoat for past mistakes, but likewise something's got to be decided to get her back to her family. Bottom line is that there's a running theme that people start messing about with big spells and it backfires on a large segment on the population. I'm not keen on regulation as a rule but there's got to be something.