Here's a list of felony crimes (not the entire list): aggravated assault and/or battery, arson, burglary, illegal drug abuse/sales, embezzlement, grand theft, treason, espionage, racketeering, robbery, murder, rape, kidnapping and fraud.

Aside from "illegal drug abuse/sales" I think that commission of any of these is a pretty good demonstration that the person who committed them is rejecting the system of laws that voting works to change.