1) Does this seem over the top?Yes. The key phrase in the law is a "reasonable expectation of privacy". Actually, the law is poorly worded. Instead of specifying that conversations must be in private areas, the law excludes public meetings and gatherings. In other words, it is overly inclusive instead of being justifiably limited.
QUOTE(Florida Code 934.02 )
"Oral communication" means any oral communication uttered by a person exhibiting an expectation that such communication is not subject to interception under circumstances justifying such expectation and does not mean any public oral communication uttered at a public meeting or any electronic communication.
For example, a Florida teen was charged in 2001 with wiretapping: for taping his high school chemistry lecture!!
Florida teen charged with taping class lectureWith such a broad reading of the
Florida statutes, you'd think that tape recorders should be illegal.
QUOTE
(1) Except as otherwise specifically provided in this chapter, any person who intentionally:
(a) Sends through the mail or otherwise sends or carries any electronic, mechanical, or other device, knowing or having reason to know that the design of such device renders it primarily useful for the purpose of the illegal interception of wire, oral, or electronic communications as specifically defined by this chapter; or
(

Manufactures, assembles, possesses, or sells any electronic, mechanical, or other device, knowing or having reason to know that the design of such device renders it primarily useful for the purpose of the illegal interception of wire, oral, or electronic communications as specifically defined by this chapter;
What other purpose do such recording devices have, other than the taping of conversations, perhaps illegally?
In this case, if there really were signs posted saying: "Warning: homeland security system. Audio and video in use" then there is no expectation of privacy at all.
2) If a "man's home is his castle", should these sort of wiretap laws not apply to one's own physical property?I won't go that far. You can't record conversations when an expectation of privacy exists. That includes if you are making plans for a crime at your kitchen table. The homeowner can't record those without consent. That makes sense to me, but if you mean recording conversations that occur in public on a man's property with signs saying you are being recorded, then I'd agree with that.