While I don't really play many online games anymore I have encountered communities that absolutely detested new additions for some reason. I never really saw the reason why since everyone was a probie player at some point on the game, and whether they asked, self tutored, or eavesdropped on conversations to learn the controls doesn't really matter, but hating on someone in a position you yourself were once in their position.
I saw someone mention comparing new players to babies on the hate scale but that isn't...really...accurate. People have their own reasons to have an aversion to young children, myself included [I am incredibly awkward around them and therefore do my best to avoid them] but new players I don't mind. The amount that sometimes drive my patience thin can be a bother, but otherwise, I'm more than happy to talk to them!
As for terms I honestly find the term "rookie" more accurate than anything on an online game. Rookies are new to the fold. Rookies aren't fully experienced. Rookies make mistakes. It's much less demeaning than noob or newbie, as people use those terms in belittling ways at this point.
Even if people used the term "rookie" in a negative light in a game I honestly don't see how it could be a stab at someone because rookies can LEARN, you just have to be willing to be patient and TEACH them how to do things [so long as they're willing to listen and work with you].
Heck were I on FH I'd be a freaking Rookie because I've forgotten all the controls and some of the important keys on my keyboard are broken.