I try very hard to give good information, and sometimes I do check on websites before replying, though I don't attempt to reply to anything I don't think I have some personal experience of. I did say I had no personal experience of growing them in pots, and I know that the UK zones are 7-10, so anemones should be fine in open ground, as mine are. I was responding to the suggestion of keeping them in pots, i.e. above ground. I do know that for many plants the hardiness zones refer to their tolerance of low temperatures in the ground. For example, Japanese maples typically are quoted as hardy to zones 5 - 6, but are less hardy in pots, and I have lost one or two due to prolonged very cold winter temperatures in Wales (1000 ft up)
When I said anemones are not very hardy, I should have explained that I was referring to the idea of keeping them in pots. By comparison, crocuses, tulips, daffodils are hardy down to Zones 3 or 4.
Sometimes we get it wrong, Blairs, and when we do most other boarders gently put one another right by offering the benefit of their own experiences and not use words like 'rubbish' to describe another boarder's efforts. While you may know your anemones you clearly have a lot to learn about good manners.
Now, where's that 'ignore' button.