My HDS 8 has it, and appears only 1 time at start up, as I leave mine on the entire time I'm on the water as well. Its a legal issue, even my Garmin Nuvi has a similar legal warning, etc., so you can sue 'em for getting lost in the big city, following the unit to the bad side of town and getting hurt or mugged. Same for on the water, if you run aground using the unit for navigation, its your fault, not theirs.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.