This shouldn't be "offered" IMHO, this should be mandatory. Yes, people are very ignorant about cyber security (I've studied in this field, trust me, I know). But the answer isn't to put the responsibility on the user! It is to design products and services which are secure by design.
If someone is actually able to crack accounts via brute-forcing common passwords, you did not design a secure service/product.
[Edit: spelling]