i only notice that some groups of pals all pop up in the same thread, usually gang up on someone in the thread and hound them out, but generally speaking its a dog eat dog answerbank. take it as it comes. trolls are inconsequential.
like joining an evening class, everyoine needs time to settle in and its anyones guess who you sit with at the first tea break in the canteen - hopefully someone who is engaging and interesting and inquisitive. if they were an overbearing oaf with some mates who nattered amongst themself and made you feel left out, you'd just find another group to sit with and chat.
i find r&s can be the most unwelcoming and villifying topic. its not for the feint hearted, i aint remotely religious or spiritual, but i qiute enjoy popping in every now and again to ruffle the feathers of the atheosts and the religioinists - it seems to give them puspose. they enjoy it really cos they can spout off some garble about their superior intelligence and look down on you. they go home happy.