This is probably more about them being used to it ? What is preventing "randoms" from joining ? What are those "unacceptable UX issues" ? BTW, if you really

This is probably more about them being used to it ? What is preventing "randoms" from joining ? What are those "unacceptable UX issues" ? BTW, if you really care about it you could insist like I generally do that it's either you or Discord/Slack.