[LokiSnake]

I know this is fine when everyone is being moral/rational. But what prevents someone from maliciously suing the skating (or something more dangerous, such as skydiving) place for something they weren't really responsible for?

[prewett]

Nothing. But to win they would have to show that the company really was responsible for it, since the accused is innocent until proven guilty. The accused can also request a trial by jury; 12 people generally make the right decision.

(Note: not legal advice, and possibly only relevant to the US)