I love them - at properly organised events only. I feel that only people with appropriate training, and thereafter being licensed to use them, and on limited days each year should be brought into effect, and the supermarkets banned from selling them to all and sundry.
I spent some weeks in the early 60's in what was termed a children's plastic surgery ward. Some of the children in there (not me), were there as a result of firework accidents. One girl, aged about 12 I think, had been in there for long periods since she was 5, having fallen into the family's bonfire, and been badly burned including her face and was having repeated operations to rebuild her lower face. I often wonder how she is.