If you're going to have a well-regulated group with rules that people are expected to follow, you need to found it as that. Go out and make yourself a guild or whatever of legal youtube streamers and from the outset have rules. Do not make a loose coalition of people who just happen to share the same job or interests or hobbies and then abruptly start telling people how they have to behave to be a 'part' of it. If you wanna play gatekeeping games, you'd better build the gate with the foundation, don't make a giant archway welcoming everyone and then suddenly step up with your hands out and start demanding qualifications to enter.