I agree too, your #4 is interesting and you may not even be reading my post!
My issue is with Exception ED, he's the guy that expects comments to his particular case that is broadly defined, he doesn't do any searching of his topic before posting a question that has been answered 100+ times before, he's just exceptional and deserves special attention. Might call him Entitled Ed, as he's entitled to other people's time after they already addressed his concerns, he's just special.
His brother is Lazy Larry, not only does he not put forth any effort to search for answers, he wants to be spoon fed information that is tailored to his opinions, often based on poor practices and information.
Ed's cousin is Fluffing Fred, this guy has the same family traits but is puts out bad information puffing up his strategy, probably beyond what he has actually accomplished and has unethical and illegal aspects. He really wants to be like his brother, Guru George and like him, will defend bad advice as he perceives his business at risk if he doesn't stick to his opinions, regardless of how it may effect others.
Then there is the Predatory Pete clan, investing is some twisted plan to grab any dollar they can without any concern for the ones they deal with or in advancing their position. This bunch tries to justify bad practices while suggesting they are doing those win-win deals. Some know better and don't care, others simply don't know any better and allow their ego to govern.
If there weren't so many of these types, Negative Nancy would be as motivated to call out bad apples or comment on poor advice. Her motivation is to ensure that newbies at least have a clue as to the reality of realty, what is unethical and illegal, what may lead to mistakes, problems and the loss of their money.
Some members are the type that if they see a purse snatcher on the corner grabbing granny's purse they will stop the thief, some don't get involved, some don't care, some want to know how to snatch purses as it seems profitable and pretty easy to do.
I'd say the other issues mentioned above, 1-3 are pretty much due to the lack of knowledge, that, or they are operating on the dark side.
The attitudes of posters are pretty easy to understand on BP, some see RE as a profession, some just want to operate with just enough information to grab a buck. You know who you are.... :)