A court summons coming means they are reporting the incident to the police/prosecutor. You will be charged (possibly with only a summary offense). You'll end up having to go in and get fingerprinted and mug shot, and end up paying that fine. Some summary offenses you can deal with without appearing, some you will have to go to court on It's possible (though less likely) that you'll have to go to court on misdemeanor and face the possibility of jail time.

If you were going to be banned from walmart, they'd have probably do so on the spot. The civil demand is NOT a fine and is unrelated to the court summons.