Blogging is something that has emerged from the confluence of technology and human nature. Given that human nature cannot be boiled down to a handy set of variables shivering nakedly under a microscope, one would expect that blogs would end up being as variable as the wellspring of their birth. It probably won't work to try to herd people into compliance with a set of rules for blogging. Who would listen? Who would care? Perhaps a self-selected group of people who might be under the illusion that their opinion should act as a guide to how things are done. If one aspires to a certain definition of what a blog or what blogging is perhaps one should adhere to such guidelines.
What's probably best is for people to decide for themselves how they want to manage their blogs. I personally like my blog in the way I like a good photograph. It's an aesthetic thing. I'm in the process of waffling over whether to re-enable comments. I like comments for the feedback and to know that I'm not alone, but I'm not really a hard-core journalist.