[Hawthorn]

With all due respect to the author and the poster, these errors really have little or nothing to do with grammar. They are simply incorrect spellings. Moreover, each example refers to the usage of a single word, whereas bad grammar normally involves a phrase.

So, here's an example of truly bad grammar:

Best Greetings from Hilary and I.

[RegulatorCountry]

Best Greetings from Hilary and I.

That error is committed by people who are trying too hard and lack a fundamental understanding of sentence structure. Just removing "Hillary and" highlights the problem for the vast majority of English-speakers, Jamaicans notwithstanding.