This must be the person's real name because nobody can fool a computer. Give it another try. You got it. People can pretend to be anything they want on the Internet so don't let them fool you - you re smarter than the computer. It's OK to use bad language on the Internet as long as you're only writing to a friend.
Bad language is never a good idea.
Have another go. Not a good idea. Someone else may have the same screen name. The only time it's OK to use bad language on the Internet is when you're answering a message you've received which contains those kind of words. Bad language is never a good idea.