That's just one of the many things that irritates me. That, and finding out that The Depantsing Prank (aka Snape's Worst Memory) happened after the Marauders tried to kill Snape. Now, Dumbledore had told Harry that James, Harry's father, had showed remorse and mended his ways after he decided at the last second to save Snape from wolf-Remus. But to judge from SWM, the only reason James would have regretted Snape's death would be because he'd have lost his favorite punching bag, not because of compassion or anything like that.