Are you serious? Every large collaboration in e.g. physics has those. You simple cannot create a splinter cell within the organization and publish whatever you want. You have to coordinate with everybody because the work is never truly yours. In case of e.g. CERN, literally thousands of people helped you in some way and they do not want you to potentially tarnish their reputation. Industry AI labs are like that as well. I know this for a fact at least in the organizations I worked at.