Yes, I was mirroring Mike's original headings and didn't change them, but this is one area where my inner pedant was awoken. Glad to see I'm not alone!

The point here is simply that you should pass the object you directly want to work with, not a class that can be used to generate that object. So if the business of your method is to actually operate on a class object, that's fine. But if you're calling new() on that class, probably not as fine.