When Spirit Airlines launched the Free Spirit program it included an opportunity to name a plane with enough points-earning. I don’t think anyone ever earned enough points (perhaps they all expired, with Spirit’s 90 day inactivity rule).
Years ago there was talk of Virgin America naming a plane for Flyertalk, or letting Flyertalk’s online community members name a plane, but that never materialized.
The world’s largest charter airline is offering the opportunity for you to choose the name of a 787.