"not to be used for navigation purposes"

[Arcady]

My Thompson TV remote had the words 'Not Dishwasher Proof' embossed on the rear!

 

[Jamesuk]

My chart plotter screen on my laptop simply says 'BEWARE if you un tie the boat using this chart software alone and you could be swimming back to your boat berth" hacked versions have these kind of jokes ;-)