Why does this group sperg so hard about randos?

None of the 4chan groups I hang with have this problem. And they have fewer randos than this group does. In most other 4chan groups, people will interact with randos and not sperg out but will very quickly shun them when they do something that makes it obvious they don't fit in. This system works perfectly fine.
But here, people nuclear sperg when they see randos. They complain about how nothing is being done. They bitch at everyone around them about randos get in. They try create votekicking pyramids. They start demanding groups. Why does this group do that? Is it just powergrabbers trying to get more control? I really don't get it. It seems like it always leads to legitimate newfriends being kicked or scared away. The constant negativity and bitching is a mood killer as well.