The Microsoft approach to security: lots and lots of warnings. This is the warning you get when you open a new, blank access file. There is absolutely no data in this file at all, let alone macros. Read that text carefully - “may not be safe if it was intended to harm your computer.” How insightful. I’d even go so far as to say the file is not safe if it was intended to harm your computer.
This warning serves no purpose and provides no security at all. What’s worse, Access only has two options for warnings, it seems: either throw a dialog up every time you open any file, or never warn you. These are equally useless options. What you need is a warning that only shows up when certain, often unsafe, conditions are present, e.g. the file contains macros. I realize the computer can’t analyze whether a file has “harmful intent,” but it can recognize when it’s exposing functionality that makes itself vulnerable, e.g. running arbitrary scripts.