I can't believe any of you are concerned about "inconvenience" to pax who deliberately and wilfully hazard the lives of fellow travellers by their selfishness.
Arrest the bastards then and charge them with reckless endangerment. A week in a cell and a $5000 fine will give them time to reflect on hazarding other peoples' lives and the furore in the meeja will impress it on others.
Public punishment is the only deterrent until we have locking bins.
Simplest is to do as I said and confiscate the bags as material evidence, a perfectly reasonable stance as they are clearly removing stuff from an investigation scene. Why should they avoid the inconvenience of lost luggage when they risked others' lives to achieve it?
Oh, and post their mugshots and names on the front page of the papers too.