In My Backyard...

The tiger shark has had to suffer from a lot of libel. It may sometimes confuse humans with seals, but once "sampling" a swimmer they notice their mistake, and abort the attack. I would not like to be bleeding when swimming in the same water, though.

In Brazil, a beach with a lot of shark attacks turned out to be near where efflux from a slaughterhouse emptied into the sea, without any sewage treatment. Not a good idea.
Anyway, bull sharks are much bigger and more dangerous, but keep to warm water. White sharks are rare, but since people seldom survive an attack to tell the tale, deaths from their attacks may be under-reported.
Tiger sharks are often filmed by divers who may be surrounded by a swarm without suffering any harm, so their danger is definitely exaggerated.

I wonder what the feasibility of digging out a large pool in my backyard and filling it with sharks would be...

That would be so creepy Chuck...what if your friend use your 'swimming pool' without telling you hmm..I feel insecure whenever I saw those sharks in aquarium!

It's only valid if you teach them to jump and bite at things hung above them... like pesky spies trying to stop your plans for world domination.

Exactly. Also, I need to find some way to rig up a bunch of trap doors that lead into it. And work on my maniacal laugh.