...and commit some sort of federal offense, to boot. At most you could take out a victimless crime that conscionable people would violate, but you wouldn't change the whole system.
They could even use prosecutorial discretion to ignore the federal offenses committed purely out of civil disobedience.
Also, you can't say what Aaron would or would not have done in response to the still-in-negotiation plea bargaining that was happening in his case. He could have chosen a plea bargain, or he could have chosen to go to trial, but he took a far more tragic third option.