So, in response to most of the "I wouldn't touch your game" responses, I would say "Where are you and why don't you live in Houston!"
LOL. I'm on an island of Canada's West Coast. Believe me, not many gamers around! But I introduced some of the people I've made friends with to the game. I run games for my friends to have a good time. As a rule, I
never hesitate to introduce someone I like to RPGs.
I don't feel the need to play with experienced gamers. I introduced 100% of my present gaming group one year ago. All teachers, social workers and counsellors (I'm not working in a school but my beloved does). They have now one year of XP with RPGs, and they are doing it all: immersive roleplay, hack'n'slash, puzzle-solving, etc. You name it.
I don't say that to brag about anything. They are normal people, and I think I'm a normal person too. I just share my passion, and those who like it stick around and have fun. You know, like... friends you share some common points with. I don't become friends with people because they are gamers (when I become friends with actual gamers it has in fact little to do with them being gamers in the first place). I make friends with people, get to know them, and then introduce them to my hobbies if they want to. If they don't want to, I won't ditch them from my friends list.
As for normal friends... heck, normal people, they respect each other. So besides giving the tone of the tabletop sessions by giving guidelines and then at times reminding people of them when there's a problem, I really don't think you need to enforce "laws" at the game table. For me, that's a matter of communication and understanding. Not law enforcement.