Here's the Snopes on that 13 footer in the first pic...
http://www.snopes.com/photos/animals/wcgator.asp

The camera angle made it appear even larger, but
legit, and from Texas, not FLA.

We have them, obviously, around our StarterShack
golf course in SW FLA. They roam from pond to pond...
a 11+ footer was captured last season from a pond
and reportedly killed. I'm told the DNR/Wildlife dept
of various states has the last word on "capture and
change location" to "kill". The danger being to kids
and about any sized pet...since they have increased
population so well, the big ones are often killed.