Easier Said Than Done: 25 Tips for Better Fundraising Copy

14. Use wrong grammar. I'm not suggesting you be churlish and deliberately make stupid mistakes. But sometimes getting it right makes you come across as a schoolmarm, which, unless you're an actual schoolmarm, is pretty unsympathetic. For instance, correct use of "whom" doesn't sound natural to most people (and it's probably dropping out of English). Any correct grammar that people don't commonly use in speech is a candidate for flouting. And if that's too painful, just revise so you avoid the issue.