[pcthrowaway]

When you are arrested in the United States, you are taken to jail. After you have your bond set, you will be released upon someone posting bail. You stated that it's very rare for simple possession to land you in jail. There was one person in jail for having been arrested with weed, and another arrested for paraphernalia. Both may have received a sentence of time served plus probation, but that doesn't negate the fact that lots of space in our jails at any given time is being filled up by people arrested with marijuana.