My story is a little different, but I believe RBS almost killed our company despite not banking with them. I'm still to this day fuming with their behaviour, and the fallout continues to this day.
My company is in an industry where Merchant Accounts are critical - and very difficult to get because we are seen to be high risk, which is fair enough. Relationships have been nurtured, terms improved over years and we are very careful not to rock the boat.
However a relatively new merchant acquirer targetted our industry, and in 2010 m
ade an offer for our merchant account business with excellent terms that we accepted (along with many companies in the same industry - hey we are a high turnover industry - so I suppose it inflated their figures rather quickly).
At the end of 2011 it was announced that RBS had made a private equity investment in the XXX Group. Our merchant facility was with XXX, which is a division of the XXX Group. We had been advised that because of the furore about RBS's banking practises, they may well be looking to remove any of their business practices that had an element of risk. But, as a company we were doing well, cash flow was healthy, business was steady, we'd reduced debts.
One summers night I was out at an informal industry event at the end of a great month, checked my emails, and there it was - and email headed 'Closure of Account'. Reading through it had the words '30 days notice - we are sorry but this decision is final'. 
It was a generic cut and paste email with repetition, basic spelling errors and untruths. Of course we appealed - we had our accountants provide support about how healthy we were, but irrespective of how we tackled it the reality was that they were closing our account no matter what.
They had said "We, in Our reasonable discretion, determine that Our relationship with Your business represents increased risk of loss or liability to Us" but we were in a healthy and strong position - ironically stronger that at anytime since we had worked with them. Their statement was patently untrue and a catchall that couldn't be proved.
It set it that they didn't care for the truth, they were eradicating our industry from their portfolio. I subsequently heard that numerous other companies had had the same e-mail, again only a few months after being courted by them. What I despised was they were putting our company at massive risk - yet they couldn't be bothered to put a decent generic e-mail out - i.e. they were closing the account under "clauses16.3.11 and 16.3.11 of our Terms and Conditions" 
The trouble is, it can take 2-6 months to get a new merchant account. As far as I was concerned - we were doomed - we couldn't last without the ability to take debit / credit cards. But, next morning, I set about tidying up financials and applying for every merchant account going. I also stopped all of our marketing - as I genuinely thought we would be closing at the end of the month. I'm sure you can't take new business if you think you're closing down?
To cut a long story short, by some miracle (or sound financial figures as some may call them) I charmed another newcomer to give us a merchant account. Terms were worse of course as were new to them, and subsequently impacted our cashflow. But they accepted us, and we went live 4 days after our old account closed. But we'd lost 30 days business - more in fact as it took it a good few months to recover. And we're still here.
I'm sure some of you are saying 'well, it was their right etc' but they had courted us only a few brief months before RBS had taken an investment and subsequently "following their credit problems in the past, they are just being agressive in their business strategy and reducing and eliminating their acid stock creditors which unfortunately ignores small businessess position." (quote from a friend who helped our analysis of the situation).
I hope you're still awake, and I really appreciate this is not exactly relevant to the situation being discussed, but it's cathartic, and hey, another situation where RBS $crews small businesses.