No one can see you, so no one can judge you. You are judged by what you do on the Internet and how it looks - by your spelling, grammar, and netiquette. You are judged by your intent - if you didn't mean to hurt someone's feelings, then it's okay.
Flaming is the act of posting or sending offensive messages over the Internet. These messages, called "flames," may be posted within online discussion forums or newsgroups, or sent via e-mail or instant messaging programs. ... Flaming is unfortunately one of the most common breaches of online netiquette.