Ghost, the problem is - I think that poem these days is much, much more applicable to the left. It's the left who are holding anti-democracy riots and demanding that those who disagree with them are disregarded. It's the left who seem to issue the most threats and intimidation (#dietoryscum anyone?), it's the left who don't want certain democratically elected MPs to be allowed to fully participate in the democratic process because they disapprove of them.
Ever. You're your own worst enemy on this thread. A lot of the criticisms people are making about it just being a superior, arrogant tantrum from bad losers who can't handle losing seem to be echoed in a lot of your posts.
As I've said, it's ineffective. Let me try and imagine I'm you and that I have to answer some of the questions you have had, I might try:
'We know the police are stretched at the moment, but we know a lot of them are concerned about the cuts too so we think they'd support us. Lots of big events still happen in London and require policing so we won't be unique and the police will have contingency plans for terror attacks during large events. And of course if anything did happen the protestors would be just as concerned as police and do whatever we could to free up resources quickly including following all police instructions.'
Or 'We're not having a tantrum because we lost, we accept the democratic result, but we think that it's important that we still show that people have concerns and they've not gone away'.
You see, simple, honest, reasonable counter argument is always more effective. That sort of argument would probably attract more people to the protest as well.
Because at the moment you really are reinforcing the impression that you are inviting people to have a mass tantrum with your responses.