Do you know the difference between THEN and THAN?
You might be a well-spoken person in real life and you might be able to cut someone down pretty smoothly, but communicating online is an entirely different ballgame. If you want your online statement to have any credibility, make sure you have correct spelling and grammar!
Do you know the difference between "then" and "than"? How well? Take this test as quick as you can and see if you get a passing grade! Why should you bother? Because your reputation depends on it!