For example in EU banks are legally required to provide you a basic service. I don't see how this is contradictory to freedom of speech.
> What about a property on a busy road - a sign there has more impact than a sign at a house off the beaten path. You're essentially arguing that because that property has more visibility, it is unfair to the other who doesn't have that same location.
In US there were a couple of court cases that ruled that free speech applies to places that are technically private. For example:
https://en.wikipedia.org/wiki/Pruneyard_Shopping_Center_v._R...
And if I'm not mistaken, you already have plenty of FCC regulations regarding means of communications like TV, radio and internet, that probably could be construed as violations of either freedom of speech or freedom of association.
We could spend all day arguing about legalities and whether it's constitutional or not. Under current laws it is in fact exactly as you say, but this is a huge problem. I live in one of post-soviet countries, so it shouldn't be a surprise that a lot of people here, including me, are against socialism. But I have to admit that the left has a point. Or at the very least had a point, since I sometimes encounter people who will say how capitalists are evil and then proceed to explain how social media are a private property and corporations are free to do whatever they want with them. If we don't do something about this, we might very soon find out how truly dystopian capitalism can be.