I killfiled him almost instantly, but had to let him out so I could pound
him proper.

Does that count?

OK, I'll take the underdog's side.

SNUBA really does have several advantages that have been overlooked in these
threads:
1. It allows those too lazy or too stupid to learn how to dive the right
way, to interact with the undersea realm more fully.
2. It prevents users from trashing the environment below about 20 feet,
keeping them in a portion of the water column where few of us spend much
time.
3. It has the potential for adding chlorine to the gene pool, removing those
least able to survive on their own and most likely to become a burden on the
rest of us.
4. It makes bodies easier and safer to find.  They are marked with a large
floating device.  It provides a means to reel them in from the surface
without actually having to go down and get their remains . . . provided you
do it soon enough after an accident.
5. If you don't do it soon after an accident, it provides an alternative
means of keeping the water's clean.  Sharks and other marine creatures are
used to finding food at the end of lines.  In time, sharks may begin to
associate hookahs and lines with food instead of hooks and lines, a hidden
advantage to those who fish, but not for sharks.
6. No matter what they do, the system does not lead to sharks associating
divers or snorkelers with food.  Those using SNUBA are clearly neither.

How's that?

Lee