This is a great reply but these people aren't here because they want to learn; they're here the announce that they're better than you, and know The Truth. So, a person like this will take your tide data and just tell you it's false, or flawed, or ask with a wink whether you really can trust it, etc etc. They're not here for conversation, they're here for a monologue.
I check the data for myself, not interested in either a monologue or your soapbox preaching. Review recent photographs of beaches from around the world from today then compare to historic photos of the same beaches.