Be really careful of what you say and write. Using just one extra or one less word, or choosing the wrong word, can reveal how you truly think. Either that, or you're sabotaging yourself with words that don't reflect how you think. Being too general makes an impact too.

And people can judge you by what you say and write.

If you don't bother to be careful and make sure you've not offended anyone with your words, others won't bother about how you feel as well.