That's interesting, how do you run your school? Do you have some kind of disciplinary policy?
High-Level:
I only teach adults.
Our kwoon has no street presence, so it's not possible to "drop by". It's also not possible to join on-line.
I ask people to contact me if they're interested in training and we work through what they are looking for and why. I almost always recommend other clubs and styles depending on what they say. If they are interested, then I invite them to visit and join us for a class. We agree that at the end of that class, we'll each thank each other and part ways amicably. If they want to train with us, I ask them to contact me again and let me know why, that way no one is on-the-spot on the night of their visit. If they plan to visit x other clubs, then there's no time limit on getting back to me (within reason). If I don't think that I can support their objectives or if I think they would disrupt our club, then I don't invite them to join, but normally if they've made it this far things work out.
When they visit, I alter things a bit to give them a view of what a normal class might look like combined with an overview of our system, what we do and why. I never explain why we are superior to anything else, but I do tell them why I chose the system and why I think it works for me. We always have tea at the end of the night and they get a chance to talk to the other students and ask whatever questions they may have. I make the point that the best way to judge a teacher is by their students, so I encourage them to touch hands with everyone ask them questions about their experience and training.
We're a club, people are in or they are out. There's no coming and going. 5 years in, we have a near 0% attrition rate. Occasionally someone will move away or something, but people don't disappear and then show back up months later with an expectation.
If they are in, they are expected to come. Of course, people have jobs and get sick and take vacations, but there is an agreement to not take soft nights off. Communication is mandatory.
Dues are simple and they are due by the last class of the previous month. I don't advertise what they are, but I will tell people when they visit or maybe when they call if I think they are for real.
We don't do much bowing and uniform wearing and stuff, but there are a few protocols and observances. For the most part, the senior students pass those on to new people. When we have visitors or visit other schools, which we generally do once a month, things are a little bit more formal and if visiting, we observe the traditions and rules of the host, of course. Once a year or so, I might have to stop class and tell them that the floor is dirty and we're not going on until it gets cleaned, but for the most part, the students self-police.
Generally, I would estimate that:
About 1/2 of the people who call get invited to visit. With people who email it's closer to 20%. Those who text...lower still.
Of the people who plan to visit, to keep the math easy, I'll say about 1/2 of them show up.
Of people who show up, maybe 70% get invited to join. Most of those accept. Probably about 20% of those who accept back out before they start.
Once people start, they tend to stay. In 5 years, a few people have moved away or something, but that bi-lateral selection process has helped avoid problems like ones we've been discussing and I feel like people know what they are getting into, there's no surprise.
Generally senior students and/or people who work harder are clearly better. There's not a lot of mystique sold about it, so people start with the understanding what progress looks like and what their role in that is.
I do take input from my existing students on accepting a new student, but ultimately it's my decision. Rare problems get dealt with pretty directly by me or the class. We don't let things linger.
Of course, all of this is pre-covid. My students and I are all in touch with each other and have seen each other a few times for back yard cookouts and things. They have keys so people have gone in to train on their own, but I haven't held class or collected dues since March. I expect that not everyone will come back and we'll have some decisions to make when the world returns to normal, but that's how things have generally run in normal times. There's a bit more, but if I publish it on the internet it will lose it's effectiveness when people participate in real life.
The short version of all of that is that I carefully chose who to train and I encourage them to mindfully chose us if they join and then commit, though I don't require any kind contractual commitment. We are all protective and respectful of what we have and we've done a good job of avoiding any real problems.
EDIT: Oh, and a big one - No posting anything on the internet about what we do. No YouTube videos, no style or lineage debating. I participate here, of course. I could lift that for a senior student, like my SiFu did for me, but we are generally private about our training beyond a certain point and respectful of other people's. A few of my students spar or train outside of the club, but they are transparent with me about it and we bring their successes and failures into our work. Generally, no one would be encouraged to do that until they had reached a certain point in their training and only with full disclosure and on-going dialogue with me.