“I'm curious about one thing though. You seem angry enough at a lot of people to hurl insults at them. I was wondering which group it is that you see as the worst kind. Is it the ones who have a decent education, i.e., the ones with their heads "stuck up their rear ends"; the "grammar police" who have the temerity to speak and write correctly or those "pompous pratts" who man university admission panels, interview boards, courtrooms etc. where individuals who sound ignorant often lose out?”
Blimey, now I've no idea who is on the offensive or who is on the defensive??
I think this debate has summarised the mood of modern Britain, and view points will be very much reflected in your age and background.
Like many others, after being academically uninspired, through a mixture of laziness, immaturity and ability, I found my path with the Military. Although able and advised by my recruiters to go for an engineering role, I stuck to my guns to be a military driver, to the disappointment of many! But I loved it, saw the world, and met the biggest cross section of people, backgrounds and cultures imaginable. This in my mind is the best education I could have received, which has served me well in the business world, allowing me to talk at all levels, adapting styles depending on scenario and audience.
But the military of the late 1980's was in decline, trying to re-invent itself in a post Cold War world, whilst clinging onto the mentality and views of greatness and long a vanquished Empire.
So as one of those individuals that no doubt sounded ignorant, my exposure to University Educated men (rarely women) was of primarily (this gradually changed) a public school background. The common factor was arrogance and superiority, something at the time that was encouraged and developed. As a driver, I was firmly at the bottom of the food chain. If tasked to pick up an officer, once military pleasantries were conducted, it was a rare occurrence to be spoken to like a human, and normally barked at as something on the bottom of a shoe, or spoke to condescendingly as if the subject felt compelled to to talk to a lower educated lifeform, keeping topics fairly low key.
This will naturally either give you a chip on your shoulder, shape a dark sense of humour, or maybe both 
The military has to have a rank structure and a no questions asked order policy, that's a given.
But it is an institution steeped in history, old school thinking and very slow and aggressive to change. The modern military thankfully bares no resemblance to the one I left in 1999, and civilian life turned out to be a breath of fresh air, with institutions such as IBM keen to exploit lateral thinking and rewarding success pushing me in directions I couldn't have imagined a couple of years earlier.
But I suspect other great institutions have also been slow to change, such as the judiciary, police, civil service, government etc. People working here in the 70's and 80's I suspect will have had similar experiences to myself. This will temper a lot of mindsets which can be passed on.
So fast forward today, and when I hear a plum accent, my guard is immediately up. Insecurities and stereotypes forged from a recent past. In the same way when I recoil after hearing the modern generation speaking in this "chav" language, forged from modern media stereotypes.
But I am huge believer in modern Britain. I genuinely believe we now live in an age where anything is possible. Education or background are no longer a hindrance, in the same way they are no longer a guarantee. We have many faults, problems and challenges ahead, but I can't imagine a more exciting time to live.
I tell my kids they can be and do anything they put their minds to. I hope they go to University, I hope they are exposed to structured thinking and their views and intellect are challenged. But I will be just as happy if they go on an apprenticeship or decide a different path.
I also hope they don't get tattooed, pregnant before 30 and continue to speak properly!
If speaking properly and using the written word correctly helps make you stand out from a crowd or opens doors to opportunities, then that is nothing but a good thing, so I fully subscribe to one of Clinton's earlier points.
But I hope the days of being judged by your education, culture, creed or background are consigned to history.
TL;DR (means Too Long, Didn't Read and I couldn't be bothered, so give me the key point)
Few people would disagree incorrect grammar in an official business document from a CV to business plan would make you look like a muppet.
But I think few people would be overly worried or concerned by a typo or incorrect grammar on a forum, at least IMHO 
I need a lie down after that, my typing finger hurts...
Radio silence from NatWest themselves.
