The laws are not the same in every country.

You are not allowed in a number of countries to carry fixed blades, unless e.g. youre hunting. And.... folders with locking blades are considered fixed blades. With balisongs it's worse. In some countries they are forbidden to own , sell or buy.
Pretty much the only thing that you may carry is a sak.

Further, if a LEO has a bad day, and find youre 3d maglight could be (mis) used as a weapon.... well then it's possible that it get confiscated.