Apostrophe Fail: 100's and 100's Of Products

This tweet from @cassie_white gave me a sharp jab of empathy:

This #apostrophefail at my local @Coles makes me want to self-harm.

Lord, I know the feeling. For some reason people really want to put an apostrophe between a number and the 's' when forming a plural. If you're one of those people, please stop the madness.

Quick rules:

• With the vast majority of nouns, you form a plural by adding 's' or 'es' to the end of the word.
• The same applies when pluralizing numbers or years. Mad Men is about an advertising firm in the 1960s. Ben Franklin lived in the 1700s. A pretty girl in her 20s  (or twenties) just started working here.  

Correction:

• At least 20% off 100s and 100s of products every week