I suggest you simply go ahead and do what you are used to doing. If someone asks you to move along, go ahead and do so (but never from wet sand, tell them to drop dead if they try to claim wet sand as theirs). The good thing is that this law will "go live" right as July 4 crowds are here, allowing us to learn pretty quickly who is going to be going crazy defending 'their' beach and who isn't.
Ok... So what changes July 1, 2018 ??The state of Florida has designated the "foreshore" or wet sand area as part of the public trust. You can walk along the shoreline even along private properties. The issue arises when people decide to stop and set up beach equipment on said private properties. How that is handled will likely vary from area to area or even from property to property. My prediction is that this will not be the disaster that the fear mongers are anticipating, but that there will be some property owners that will not allow anything on their property besides walking along the shoreline.
The use of fear mongering and scare tactics has many people in an absolute frenzy and/or panic over the beach. Many beachfront owners are perfectly willing to share, but there is a vast difference between being willing to share and being forced to share, especially without consistent and timely enforcement of rules/ordinances governing the beaches.
Not sure about everyone else but the 1st day of the new or lack of customary use rule seemed to be business as usual. On the west end of 30A we didn't see anything different. No private property/trespassing signs, no property owners chasing people off their beach, no police. Just locals, visitors, friends and families enjoying the beaches just like we always have. The one noticable difference was with the absence of tents and canopies.
Beach ambassadors were at the access asking beachgoers to please use the public portion of the beach or state park if using tents and canopies. Otherwise, be respectful of the beach and property you are on and enjoy the day on the beach.
I can understand property owners not wanting their beachfront full of canopies, loud music and unruly crowds. If we all treat the beach and each other with respect there shouldn't be any issues.