Felonies are federal crimes. A conviction or warrant does not expire regardless of the state as far as I understand. The statue of limitations running out is something else entirely.

As for felonies vs infractions.. You brought up real world crimes and punishments as an analogy in your post.. I was expanding upon your analogy.

In my opinion, a warning is like a forum misdemeanor and an infraction is like a forum felony.

If someone posted real-life threats to me I certainly would not consider it minor, nor would I want such actions to be "forgotton" over time. Such things are as serious as it gets on this video game forum and should not be dismissed... Just like a felony.