The difficulty comes of course when posters cannot get the same sense of context that mods do, which is understandable.
Taking these posts (to the best of my recollection, which is not perfect) for example:
Post 1 - A report was made, and intrinsic and imaginedvl were clearly getting frustrated with eachother
Post 2 - This is a poor example of pre-empting trouble, as it had well and truly began. We were barely 15 minutes into the MS conference, and 3-5 posters were clearly out to ridicule anything Microsoft could achieve. In the wake of that, multiple posters were banned. Indeed, one poster appears to have posted at the same time as me "lol indiebox."
Post 3 - A report was made. I responded with a joke (the picture) to make people aware of my presence. If people feel it is not appropriate to use these jokes, thats a discussion that can be had - thus far people seem to have mixed opinions. As Cone pointed out, mods are posters as well, we have senses of humour like everyone else.
Post 4 - I had literally just moderated someone - this was not an attempt at pre-empting anything, but a warning for those who remained unmoderated.
In general, I don't entirely disagree with your point. It is quite possible for moderaters to be overbearing where no trouble exists. The difficulty is, that you cannot know the context that may be available to moderators - which is understandable. As a result, none of the posts you've linked represent examples of the argument you're attempting to make.