Steep bank

Went to see my dad in hospital today. He'd had a 7 hour operation with a team of 5 surgeons, anaesthetists, etc around him, and was now in intensive care, but was looking very well and was quite jolly. We mused on how much this would cost. You know that the NHS is a good thing but most of the time you don't have much to do with it. When you do, you are forcefully reminded how great it is - all the staff were friendly, helpful and professional, the hospital ward was clean and modern. That anyone should want to mess with it should be a criminal act. Which is my analogy with this sign - this meddling is a steep bank, it quickly leads to danger.