Think spelling and grammar don't matter? Try taking this quiz about Phishing schemes. The Amazon.com one was hardest for me.
I got 10/10. Beat that! Oh, right. You can't.
The most important part of the quiz is they tell you how to identify fake websites out to get your information. While the secret to some of them is the fake URL, for most of the sites the giveaways are that gawdawful Nigerian grammar, phrasing, and inconsistencies.
End lesson: If you're writing emails or websites, quadruple check that your writing sounds like a human being and you're doing stuff consistently. If not, you might have dipped instantly from 'trustworthy' to 'potentially trying to rip me off.'