Today however any crime that could warrant over 1 year in prison is a "felony" couple that with the "war on drugs" and other "war on"'s that have greatly increased sentencing lengths now you can get a felony for pretty minor things.
Most states even have what are referred to as "catchall" felonies, things like "common nuisance" that can be charged with the sole purpose of getting a plea bargain for a lesser charges.
In Short the Legal System is a mess.
Not that it doesn't support your thesis, but all felons are banned. Even those guilty of e.g. environmental "wetlands" (based on law about navigable waters) "crimes" absolutely lacking in mens rea (guilty mind; feel free to substitute your own favorite ludicrous felony).