It is not specifically made to exclude technically less experienced players.
I disagree, I'm having trouble with it since I'm not a tech-head.
From dictionary.com:
nerd
an intelligent but single-minded person obsessed with a nonsocial hobby or pursuit: a computer nerd.
PlaneShift's a pretty social hobby.
geek
1.
a computer expert or enthusiast (a term of pride as self-reference, but often considered offensive when used by outsiders.)
2.
a peculiar or otherwise dislikable person, esp. one who is perceived to be overly intellectual.
Not everyone's a computer expert, but PlaneShift players are certainly peculiar. However, I never found anyone to be "overly intellectual."