At any age, that's a foolish thing to do. You need to remember that people come to this forum looking for answers to questions and help with problems. They don't need someone making things up as they go along. If you don't know an answer, don't make one up. Remember, thousands of people read these threads for many years after they've been posted, so if you mislead someone with false information or foolish suggestions, you're misleading thousands. There are many new Mac users who can easily be misled.
The good news is you can read and learn, so you WILL have the answers for future threads. As for the topic of this thread, here's a good place to start in your education:
There has never been a virus in the wild that affects Mac OS X since it was released 10 years ago. The handful of trojans that exist can be easily avoided with some education and common sense and care in what software you install:
The first section of that link deals specifically with the MacDefender/MacSecurity/MacProtector issue. I encourage you to read it.