Tragic incident. IIRC a similar shooting was in the news a few years ago involving a Japanese student (or exchange student) and a homeowner with a 44mag, on/near Halloween I think?? Except in that case there apparently, in fact, was no malicious intent on the part of the victim.
As has already been covered, antagonizing people at midnight on purpose is a hazardous endeavour, best avoided.
While the homeowner may be legally vindicated, killing someone who never intended you harm will be devastating psychologically - assuming reports of the victims "innocent prank" are accurate.
The way things turned out in Louisiana the law says you can kill a man (woman or child) for knocking on your door even if you do not have a locking gate at your properline and have neglected to post your property.
It's a very good reason for people to NOT live in Louisiana.