The IT department? I would have thought that FT would use some off-the-shelf forum management software, rather than developing it’s own.

At any rate, I don’t think it is entirely fair to blame ‘user awareness’, because, the first time I posted an image, I had no idea that it would turn out so extraordinarily large, because there was no warning that it would be so, and I just trusted the forum to display my image at an appropriate size. And, in any case, there is no facility to change the size of an image (apart from directly editing the source), and this is inconvenient for anyone posting from a phone, which is in many cases the source of the problem.