Most people are not idiots, and I'm sure the authors of the above ads are not either. I sure wouldn't do business with any one of them. I read another ad for Web Design and the HTML coding in his ad was wrong. That sure built a lot of confidence. Guess they feel like I do.
Many people rely too heavily on the spell checker on their computer.
This is a mistake. After you do spell check, get someone else to read it. When writing something, many times you get so close to the article, you miss mistakes that someone else would quickly find. Many words that are being used incorrectly will pass spell check. If it is written well, and has an attention getting headline, you just might make that sale.