> Can't they?

For every single grocery store in the world to starve the population of people who do not vote for decreasing their taxes?

No, I am pretty sure that society would do something about that, if this happened.

I’m not sure I follow this line of thought. If all the grocery stores did this, then I agree society would certainly take action: build better, more open grocery stores. surely the same principle applies here, A business like Twitter can choose to block a group of ideologies. If there is enough want in the part of people to propagate those ideologies, they’ll build a better forum and if those ideas are successful, that forum will be. Competitive, capitalistic behavior handles this.

> build better, more open grocery stores.

Not necessarily, no. Many grocery stores have a bit of a monopoly in certain areas. It may not be possible for competitors to replace them instantly.

And a lot of people would starve before perfect competition, which doesn't exist, comes around to eventually replacing them.