I just may look tasty, Mr. Denny...like a Fun-Size Brown Shrimp.
There could be many factors, then some of those factors would see opposition, but I "see" several contributors. Some species are illegal to take, most species aren't favorable table fare, all harvestable species creel is very limited...while humans harvest the Sharks natural food (commercial take is heavy). There used to not be so much restriction on the harvest of Sharks, many were finned, many were killed for fun and spite...now they're much more protected.
Probably the last 1-2 years, I've been reading and hearing about the increase in numbers, encounters, and some attacks. I absolutely believe we're seeing an increase. I wish I could believe I'm wrong. I believe a major increase is as true as the threat (and presence) of the Snakehead and Jumping Carp.
You won't find me wading the surf anymore...sadly...surely not waist-deep.