Tourists fishing should get their moneys worth and fish the reef, not docks where all the boats pull up with engines running & fuel vapors.
I know the price of gasoline is high - but not leaving the docks is just wrong! IMO
Sorry for your troubles.
Maybe you need a new sign that states
"If your guide has you fishing here - get a better fishing guide!"
or "Not one good fishing guide would let you fish here!" or "This dock is for boats & people not fishing - all good guides know this!"
Catch my drift? I'm sure lots of people could help with new words for your sign - just ask!
Belize it!