There was great practical risk to Aaron from pleading to any felony. Felons have trouble getting jobs, aren't allowed to vote (though that right may be restored) and cannot own firearms (though Aaron wasn't the type for that, anyway). More particularly, the court is not constrained to sentence as the government suggests. Rather, the probation department drafts an advisory sentencing report recommending a sentence based on the guidelines. The judge tends to rely heavily on that "neutral" report in sentencing... If he plead guilty to a felony, he could have been sentenced to as many as 5 years, despite the government's agreement not to argue for more. Each additional conviction would increase the cap by 5 years, though the guidelines calculation would remain the same. No wonder he didn't want to plead to 13 felonies. Also, Aaron would have had to swear under oath that he committed a crime, something he did not actually believe.