Lol Rik, well I suppose you could say at least they had a sense of humour about the uselessly (but scarily necessary) obvious warning, even if it was a sarcastic one.

Couldn't resist ... here are some more obvious and humourous warnings / advice labels - found from around the web :

Hershey's Almond Bar
Warning: May contain traces of nuts.

Washing Machine
DO NOT put any person in this washer.

Stridex Foaming Face Wash
May contain foam.

Zantac 75
Do not take if allergic to Zantac.

Sleeping Pills
Warning: May cause drowsiness.

Christmas Lights
Warning: For indoor or outdoor use only.

Komatsu Floodlight
This floodlight is capable of illuminating large areas, even in the dark.

Mattress
Warning: Do not attempt to swallow.

Hair Dryer
Warning: Do not use while sleeping.

American Airlines Peanuts
Instructions: open packet, eat nuts.

Nabisco Easy Cheese
For best results, remove cap.

Heinz Ketchup
Instructions: Put on food.

500-piece puzzle:
Some assembly required.

Bag of Fritos:
You could be a winner! No purchase necessary. Details inside.

Tesco's Tiramisu dessert: (printed on bottom of the box)
Do not turn upside down.

Japanese food processor:
Not to be used for the other use.

New Zealand insect spray:
This product not tested on animals.

A frisbee
Warning: May contain small parts.

Portable stroller
Caution: Remove infant before folding for storage.

Sign at a railroad station
Beware! To touch these wires is instant death. Anyone found doing so will be prosecuted.

Bus Stop
No stopping or standing.

Espresso Kettle
The appliance is switched on by setting the on/off switch to the 'on' position.

Road Sign
Caution water on road during rain.

Bottle of bathtub cleaner
For best results, start with clean bathtub before use.

Toilet on display in shop
Please do not use. Demo only. Thank you.

Don't know how accurate/true these are, but they give you a giggle ...

... and two from my own fridge/cupboard:

Homebrand Tasty Cheese
Contains: milk.

Kraft Peanut Spread
Allergen Statement: contains peanuts.

My favourite (in this sort of genre) is a sign that states "Warning this sign has sharp edges", says it all really.

Thanks for the thread Rik.

Regards

Su