However, Manchester is not irrelevant and should not be easily dismissed. Thirty years ago it wasn't common practice for airlines to charge those passengers - probably the majority - who didn't want to take a suitcase into the aircraft cabin. Indeed, taking this further, perhaps it was actually a lack of carry-on bags that allowed many at Manchester to escape with their lives.
Nowadays, airlines financially penalise passengers who wish to take even a mid-size suitcase. Cause and effect: in turn, that's now become a primary cause of the current large quantities of carry-on bags, because monetary benefits will apply. Thus the airlines themselves actively encourage more cabin baggage.
Admittedly this doesn't answer the thread's "fine/prison" question, although I consider both of those alternatives to be unrealistic and impractical.
It's obviously very fortunate that unlike flight 028M, recent events haven't involved the loss of passenger/crew lives. However, bearing in mind "the tombstone imperative", I fear it will take another Manchester before authorities review the current-day actualities.