1) None of them besides me are Star Wars geeks. My dad likes Star Trek and makes fun of Star Wars. My dad hated Episode 2 and said that the script was fifth grade work. He said -I- could write better than that, and that's comparing me to a director who CREATED Star Wars in the first place and has way more experience in writing than me.
Well, I am a Trekkie too. Save for the special effects, I was not a fan of episode 2 or episode 1 (for that matter). Still, there is something about Star Wars that refuses to die.
However, in answer to your dad, simply ask him what the deal was with Star Trek V? He'll quiet down after that.
2) ....They're computer illeterate. They barely know how to type, and wouldn't last long posting on the message boards.
ouch. Yeah, knowing how to type is a must.
3) I don't trust them saying something stupid to my online friends...Which HAS happened, thanks to my dad. Because of some chick thinking I dated some...guy I didn't even know from the internet, he thought I had an online boy friend.LOL... Sorry to laugh at your expense but I can imagine your dad trying to grill you and your online friend over mysterious bf.
Still, I note you didn't answer the question as to whether you did or not...

4)...I'd be much better off just starting it out slow and hoping to build the members up to a good amount than having friends and family join.
Heh... ok
5) None of them would actually remember to post because they don't spend that much time on the net.
That's cause they're too busy looking over your shoulder eh?