>>416292179
Yes, they get in because people have friends in other communities. Then they don't get noticed or don't get kicked in time, and then people join on that one rando. And then more join on them, and so forth.
The reasons why people have friends in other communities varies. IRL friends, friends from before /vrg/, drunkenly accepted requests, someone who seemed nice enough in a public world, befriending people in communities centered around pieces of media (like the old Persona or Touhou communities), the list goes on.
But does it matter? If they don't use 4chan, they don't belong. Randos joining happens. No one is going to hate me for it when a friend from years ago suddenly logs back into VRChat and joins on me.
There is no problem here, as long as we keep the randos out.