I am not a parent yet, though I do work in childcare. I am also still semi-at home (when I am at my dad's, it's being at "home" not as an adult in my parent's house).
I don't believe spanking (in the non-abusive sense of not leaving marks of any sort) is necessarily wrong. I do believe it should be used as rarely as possible.
Even granting that, I find the statement "Stop crying or I'll give you something to cry about" completely and utterly wrong. It's not punishing the negative behavior (opening the package), it's punishing the crying. Also, children DO internalize what their parents say about them. My father was never abusive in any legal sense. However, I never did good enough for him, and I KNEW it. It's taken a year and a half of being at college before I've hit my current point of only feeling that I'm not good enough occasionally. Some children are more sensitive than others... And I never let my parents know how sensitive I was. Some of my first conscious memories (of kindergarten) are of making sure I was calm before walking into my house after a day of teasing... that hurt, but I wanted, even at that age, to protect my parents.
Although I wouldn't necessarily call those statements in of themselves abusive, they may be indicators of possible abusive behavior, and even if not, that kid, if it really was his father, could easily grow up with issues. *sigh*
This post comes out of my personal experiences a lot, though some of it also comes from my educational studies class... I acknowledge it's just opinion, but please be... not too harsh in arguing it, since some of this is still sensitive.