This is a community where you have to get to know people after all. Thats not inherent to any "problem" about friends not letting new people in. Infact folks who complain about the fact these groups already are friends and that somehow intimidates them from joining factions in the first place perplexes me.
The role play is for the most part vary much unmoderated and that might turn off a seasoned rper who expects structure of the tyrannical DM kind. The Admins can be seen as dms but the idea here is have fun play nice and dont bounce into admin territory in the first place IE the breaking of rules.
So after getting a feel for the territory. and you can squeeze past the forest of unknowns for the trees that get in your way and not get too.. bitter about the way things -are- im sure anyone can find the right people and the right concepts that can satisfy them here.
Anywho. In most cases your going to encounter some poor new guy or russ in the server with terrible english and.. completely unpredictable behaviour and that by itself should not discourage a "serious" anything. That element exists in a lot of games and a lot of communities.