Alcatraz would be great if they employed my idea. At the end of pier 39, which is across from Alcatraz, we could set up a shooting range. Charge say so much per round per caliber and one gets to blast away and see if they can nail one of these creatures. Say $1a round for a 30-06 out of a BAR; $8 a round for a 50 cal out of your choice of rifle or M2; all the way up to say $100,000 for an A10 straffing run. I don’t have a schedule for 105s or 30MM cannons but you get the idea.
I would not go that far, but see if there was a way to encourage sharks to swim around the island to deter escapes...