For clarity, absolutely nobody did or does this. Spirit is bottom of the barrel cheap - it made flying accessible for many people, who otherwise would not fly (think Ryan air). Absolutely nobody was interstate day tripping, especially on spirt, besides this poster.

I'm not sure why you're downvoted. You're definitely right that it's extremely rare behavior.

This is based on access to their passenger records and having done data science analysis on it, or just vibes?