Green? Don't bank on it.

Having noticed HSBC focussing on how green they were trying to be in their recent advertising campaign (including their "sale" ... how can a bank have a sale??), I realised that they obviously had something very important to tell me when I received 5 pages of typed A4 plus an explanatory leaflet a few days ago.
So, the letter was to do with my overdraft facility. I have had an overdraft facility with HSBC ever since I was at university, and nothing has changed about it for at least 10 years.
Blah, blah, blah, overdraft, blah, blah, blah, review, blah, blah, blah, interest rate, blah, blah, blah ... Ah, here it is ... Your overdraft facility will remain the same.
Now HSBC, don't you think you could have mentioned this on one corner of my statement? emailed me about it? left a message on the internet banking system I regularly log in to? Or even just presume that I would realise that if not told of any changes then I would realise that the status quo remains?
I suppose they know full well that inertia will keep me as their customer, so this needn't really concern them.