I agree that Glee is now a little too liberal with the term bullying, although I think their intentions are good considering the social climate… but no, dodgeball is not bullying no matter what Kurt says, and Finn calling Brittany stupid once is not bullying, it's not a nice thing to do but it's not bullying. I see bullying as the systematic torment of another person with the intention of making them feel like shit. What Karofsky did to Kurt was bullying, and in my opinion, what Quinn (and Santana) did to Rachel early on was very obviously bullying. Quinn made incredibly hurtful comments on Rachel's myspace (cyber-bullying), she drew pornographic pictures of her in the school bathroom to humiliate her, called her awful names whenever she saw her, laughed when she was publicly humiliated by being slushied, and basically took every opportunity available to make Rachel feel bad. Her behavior was intentionally cruel and occurred systematically over an extended period of time. Everything is up for interpretation, but I cannot see Quinn's early treatment of Rachel as anything other than bullying.
Except I'm of the opinion that Quinn hasn't bullied Rachel for years.
Quinn has treated her badly, but not bullied her because it is a very Glee thing to do is to describe when one character treats another badly as bullying.
Or is that bullying Rachel is ok, just don't do it to Kurt?
On Glee, yes. That's why a thread like this exists.
Plus, a lot of the times that Quinn has come after Rachel, Rachel had it coming in true high school girl fashion.
How so? Most of (if not all) Quinn's bullying of Rachel was unprovoked… Rachel standing in the hallway and Quinn sauntering over to her and calling her a name… there's no explanation for the pornographic pictures, they're just something Quinn thought to do… and all Rachel did to bring about the comments on her myspace saying her fathers should sell her back was post a video of herself singing.