The majority is automatically predatory because it can be. Passing a law to tax or otherwise coerce one’s fellow citizen is so much easier than competing with him/her on the free market.
Now, if you agree that such coercion - when imposed by the majority (let’s say, because the majority concluded it’s in “public interest”, but why is not important here) - is legitimate, then it’s only a matter how much to take and from whom.
In other words, if you establish (or “believe”) that it is morally right, then what else prevents the majority from doing what it pleases? Certainly not laws because the majority can pass whatever laws they like - after all it is morally acceptable, so there’s nothing wrong with that.
@Al_Kafir mentioned International Conventions on Human Rights. In theory that’s right, but in practice has that ever worked for anyone? Every few years some isolated example is hyped in the media, but in the meantime billions around the world are completely helpless.
Democracy invariably leads to totalitarianism. This isn’t tightly related to one’s political views (socialists, fascists, Christian democrats, liberal democrats - they all support democracy) so I wasn’t to guess yours. I’m just making a point that by definition democracy coerces minorities because it is designed to do so. That’s the whole purpose of democracy.
Let’s see one example (by @al_kafir; who means well):
I think at some point soon, some kind of community voting structure must be utilised, in order to address these kinds of issues, alongside the Safe Foundation in the future.
What if a user who is otherwise in good standing refuses to participate (say, he doesn’t tag his publicly shared adult videos with “appropriate” ratings tags suggested by the community)? At that moment such the community becomes either useless or - if it manages to coerce the disobedient user - authoritarian. That’s exactly how democracy works.
So key to the problem of a small group of people deciding what to do is not to enlarge that group (Five morons are terrorizing the populace? Let’s make that 5 million morons!), but to altogether remove it from the position of power.