It still would be easy if (god forbid) my personal facebook had inappropriate images as the profile picture or my twitter had a lot of NSFW content as there’s no moderation on any of it.
The current system they are using is perhaps not ideal, that said Facebook does allow apps to reach the pages you are a part of. In the future, ROBLOX will perhaps ask you to log in and allow you to link your profile to a page you manage.