Do you know what the purpose of that sign is? It's not to evoke en emotion, not to convey some abstract message about the corporate structure of the refrigerator, not to let everybody know that the fridge is successful enough to afford some designer who can spend time obsessing over font choices, it's to abstract the thought of "please stop eating my yogurt" into a universally-understandable form.
This type of thing is important if you're Charles Schwab and you're trying to make me feel warm and cuddly about trusting you with my money. The message I'm getting from your ads goes beyond just the words. This is the same as keeping the grass in front of your building trimmed, making sure your staff irons their clothes, that your building isn't in disrepair, that your board members aren't caught doing embarrassing thigns, etc. etc. It's all image. It's 3 forks at dinner. Do you need 3 forks? No, you don't.
Likewise, do you need to worry yourself with things like the typeface that you're using to write a birthday invitation for your 9 year old?
No.