The article is long on words and on Concern, but short on actual compact statement of the problem. Can you help me out here and list some of these problematic private rules?
Another point of the article is that the majority of the land owners refused to answer the question. You don't even know what you can and can't do until you're trespassing. Please RTFA.
Why should landowners talk to the Guardian? It isn’t like that would ever turn out well.
One example from the article: the London City Hall, where the major works from, is in private space so there can't be any demonstrations there. Don't you think this is problematic?
Or the whole City of London, containing many organisations that you could argue were at the root of the financial crisis a few years back.
Yes, along with Canary Wharf, both private places with even private police. But I'd say the City Hall example is a level more problematic than that because that's where you would demonstrate, there's where the decision making is happening. Imagine not being possible to gather in front of the Houses of Parliament...