Well I have to laugh at the TMZ photo because that gator is closer to the size of an iguana, yeah it would be meaner but it wouldn't be able to take down a human just a nasty chunk from someone or maybe a finger if you were dumb enough to try and play with it.
As for the problem getting worse... well given alligator were so rare in the early 1970's that they were on the endangered species list and today the numbers have increased to the point that they are no longer on that list... Well logic would say yes they are more of a problem simply because there are more of them increasing the odds of encountering one at any given place.
It wouldn't be a large enough problem that I would cancel my trip if I had one planned... But I wouldn't let a kid or pet wander unattended anywhere in Florida (gators turn up in people's backyard so even swimming pools in a backyard aren't 100% safe).