I found this...
(11) Each supervisor of elections shall forward to the property appraiser for the county in which the homestead is claimed the name of the person and the address of the homestead of each person who registers to vote at an address other than that at which the person claims a homestead exemption, as disclosed on the uniform statewide voter registration application pursuant to s. 97.052.
http://www.flsenate.gov/Statutes/index.cfm?App_mode=Display_Statute&Search_String=&URL=Ch0098/SEC015.HTM&Title=-%3E2004-%3ECh0098-%3ESection%20015#0098.015
Surely this info could be obtained under FOIA.
Once again, the laws are probably on the books to prevent the lunacy. It's simply a matter of getting someone to impliment the laws!