Re: 3 points @Charles 9
Sorry, you are wrong. Only in extreme circumstances is negligence a crime - Gross Negligence Manslaughter, for instance*. Crime is defined by the answer to the question "can the State imprison or fine you for it?". If yes, it is a crime. If no, then it is either a civil matter or nothing punishable at all. Simply having knock-on effects in public doesn't make the initial action a crime.
*Of course, you might be thinking of recklessness, but the rule on this is very tightly proscribed, at least in the UK - it requires a subjective test: successful prosecution requires that the prosecution proves i) that the accused was aware of a risk that it exists or will exist; and ii) that it is unreasonable to take the risk." This is quite a difficult hurdle to get over.