Sigh, players should be instantly told why they're sent to jail even if it's vague reasoning. It wouldn't be difficult for SE to put it in a dialogue box that appears when they enter the area so that players have -some idea- as to why they're there. Many players have ended up there having no clue what the place even is, and then have to wait for ages for a GM to explain what happened.

And as others said be mindful when you speak with people you don't know. For example you can end up in jail for dropping a F bomb even if you didn't say it with the intent to hurt or anger anyone. SE only care that you dropped the F bomb, not why.